US Coast Guard LNM - Heartland District Gulf (D8)
US · 296 in force · 35 new this week · 260 archived · updated 11 Nov 2026, 19:02 UTC · page 2 of 6
- LAKE SALVADOR - BAYOU PEROT General / Hazards To Navigation / Obstructions Bayou Perot - Partially Submerged Anchor --- Reported: 2026-11-01 --- An anchor has been reported partially submerged in the Bayou Perot Channel, in approximate position 29-41.06N 090-10.47W, on November 1, 2026. The partially submerged anchor is reportedly not marked. Mariners are urged to transit this area with extreme caution. Position 29-41.07N 090-10.47W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-950DBFSÉCURITÉTENNESSEE TOMBIGBEE RIVER General / Marine Construction (Excluding Bridges) / Dredging Tennessee Tombigbee River - Dredge Operation --- To: Until Further Notice --- The Dredge E. STROUD will conduct dredging operations in the Tennessee Tombigbee River near Mile 326.0 (Aliceville Lake). Operations will take place 24-hours a day, 7-days a week. Dredged material will be placed in permitted upland disposal areas. Mariners are urged to transit at their slowest safe speed to minimize wake and proceed with caution after passing arrangements have been made. VHF-FM Channels: 16, POC: (662) 245-5500 Valid 2026-11-04 until further notice. Position 33-25.27N 088-25.82W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- MOBILE CHANNEL - MOBILE RIVER General / Hazards To Navigation / Shoaling Reported Mobile River - Mobile Channel - Draft Restrictions --- Reported: 2026-11-02 --- Recent soundings conducted by the U.S. Army Corps of Engineers, Mobile District, indicate areas of reduced depth in the South Turning Basin near McDuffie, APM, and Pinto Island. As a result, a draft limitation of 46 ft is now in effect for vessels turning in the South Turning Basin. The USACE will update on dredging in the South Turning Basin as information becomes available. Survey updates can be found at: https://www.arcgis.com/apps/dashboards/4b8f2ba307684cf597617bf1b6d2f85d# USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- BAYOU RIGAUD - BARATARIA WATERWAY General / Hazards To Navigation / Obstructions Barataria Waterway - Uncharted Mooring Buoy --- Reported: 2026-10-30 --- An uncharted yellow mooring buoy with 1-inch wire rope mooring, approximately 70ft long, has been reported south of Barataria Waterway Light 6 (LLNR-16170), in updated approximate position 29-17.43N 089-58.36W, on November 1, 2026. The yellow mooring buoy is reportedly not marked. Mariners are urged to transit this area with extreme caution. Position 29-17.43N 089-58.35W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-EC6182SÉCURITÉSECTOR MOBILE, SUBMERGED LAND ACT (SLA) - BILOXI EAST CHANNEL General / Marine Construction (Excluding Bridges) / Dredging Biloxi East Channel - Mississippi Sound - Dredge and Disposal Operation --- --- Dredging and disposal operations will be conducted in the Mississippi Sound near the Biloxi East Channel and Deer Island. Operations will be conducted 24-hours a day, 7-days a week. The Dredge COASTAL ROSE will conduct dredging operations in the project area. Dredged material will be transported via floating and submerged pipeline to fill and rehabilitation areas located off the southern and eastern tips of Deer Island. On-scene vessels and equipment will include barges, tug boats, crew boats, floating pipeline, submerged pipeline, and additional construction equipment. Vessels, pipeline, and equipment will be staged in or near the project area and outside of the channel. Mariners are urged to transit the area with caution and at their slowest safe speed after coordinating with the on-scene project vessels. VHF-FM Channels: 13 ,16, 69 and 74, POC: (985) 960-2819 Valid 2026-11-10 to 2027-02-28. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- MORGAN CITY TO PORT ALLEN - MORGAN CITY-PORT ALLEN ALTERNATE ROUTE General / Bridges / Closure (Scheduled Or Emergency) Morgan City-Port Allen Alternate Route - Bridge Closure --- --- The LA 75 Bayou Sorrel Bridge across the GIWW Morgan City-Port Allen Alternate Route at Mile 38.4, near Iberville Parish, LA, will undergo repairs and rehabilitation. The bridge will be closed to marine traffic for repairs on the following dates and times: • December 8, 2026: 8:30 a.m. to 4:30 p.m. • • December 10, 2026: 6:00 a.m. to 5:00 p.m. • • December 13, 2026: 8:30 a.m. to 4:30 p.m. • • January 19, 2027: 8:30 a.m. to 4:30 p.m. • • January 21, 2027: 8:30 a.m. to 4:30 p.m. • At all other times, the bridge will operate in accordance with 33 CFR 117.478(a). During the closure periods, mariners may obtain updates by contacting the bridge tender at (225) 659-1484. Valid 2026-12-08 to 2027-01-21. Position 30-09.33N 091-19.88W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, TERRITORIAL SEA - SECTOR MOBILE, SUBMERGED LAND ACT (SLA) General / Miscellaneous Alabama River - In accordance with Section 7-11 of the ACT Master Water Control Manual dated April 2022, full navigation channel availability on the Alabama River is dependent upon channel maintenance, seasonal flow conditions, and basin status. Flows for navigation are most needed in the unregulated portion of the lower Alabama River below Claiborne Lock and Dam. Alabama Power Company (APC) operates its reservoirs on the Coosa and Tallapoosa Rivers to provide a minimum navigation flow target in the Alabama River at Montgomery, Alabama. Basin status criteria are correlated to APC Drought Operations (ADROP) updates which monitors drought triggers related to basin inflow, state line flow on the Coosa River between Georgia and Alabama, as well as composite storage availability within the APC projects. These updates are provided monthly on the first and third Tuesday. Below is the most recent ADROP update provided by Alabama Power Company on October 20, 2026: *ADROP UPDATE* - Low Basin Inflow: FALSE - - Low State Line Flow: FALSE - - Low Composite Storage: FALSE - - Montgomery Flow Target: 4,200 cfs daily average (NOTE: ADROP requires one drought intensity level change per cycle regardless of the number of triggers enacted when exiting drought operations.) - - Current Operations: Drought Intensity Level 1 - Currently, based on profile survey conducted on 04JUN2024, a 10 ft tailwater elevation near Claiborne Lock is required to provide a 9 ft navigation channel on the lower Alabama River. A modified depth of 7.5 ft navigable draft can be provided with a tailwater elevation of 8.5 ft at the Claiborne Lock and Dam. Commercial mariners should check water levels daily and schedule lockage appointments by calling the Claiborne Lock Supervisor at (251) 282-4575. Tailwater elevations below Claiborne Lock and Dam can be viewed at: https://waterdata.usgs.gov/monitoring-location/USGS-02428401 Position 31-36.90N 087-33.10W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-A20BE9SÉCURITÉTHE RIGOLETS - LAKES PONTCHARTRAIN AND MAUREPAS General / Marine Construction (Excluding Bridges) / Survey Operations Lake Pontchartrain - Survey and Boring Operation --- --- Survey and geotechnical drilling operations will be conducted off Goose Point in Lake Pontchartrain. Surveys will be conducted during daylight hours at eight separate locations, in an area bound by approximate positions: 30-15.08N 090-02.37W, 30-16.54N 090-01.44W, 30-14.97N 089-58.53W and 30-13.64N 089-59.45W. The survey vessel may operate at slow speeds with survey equipment deployed in the water. Following completion of the surveys, geotechnical drilling will be conducted at eight proposed boring locations in the same area. Geotechnical boring will be conducted from a marine geotechnical drilling platform/pontoon. The drilling platform/pontoon may remain stationary at individual boring locations for extended periods. Mariners are requested to exercise caution when transiting the area, maintain a safe distance from survey and drilling operations and any deployed equipment, and transit at their slowest safe speed to minimize wake. VHF-FM Channel: 16 Valid 2026-11-09 to 2026-11-20. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-AC132ESÉCURITÉSECTOR MOBILE, SUBMERGED LAND ACT (SLA) - BILOXI EAST CHANNEL General / Marine Construction (Excluding Bridges) / Dredging Biloxi East Channel - Mississippi Sound - Dredge and Breakwater Operation --- To: 2026-11-03 To: 2027-05-02 --- Dredging and breakwater construction will be conducted in the Mississippi Sound near the Biloxi East Channel for the Deer Island Ecosystem Restoration Project. Operations will be conducted 24-hours a day, 7-days a week. On-scene vessels will include a hydraulic cutter suction dredge, two dredge tenders, a marsh buggy, a supply barge, the M/V PINE BLUFF, spud barges, anchor barges, a survey vessel, and lighted and marked floating pipeline. Vessels and equipment will be staged in the project area and outside of the channel. Mariners are urged to transit the area with caution and at their slowest safe speed after coordinating with the M/V PINE BLUFF. VHF-FM Channels: 13 and 16 USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, SUBMERGED LAND ACT (SLA) - CHOCTAWHATCHEE BAY General / Hazards To Navigation / Obstructions East Pass - Choctawhatchee Bay - Bridge Fender Damage --- Reported: 2026-11-02 --- The US-98 William T. Marler (Destin) Bridge fendering and protection system has been reported damaged. Damage includes broken boards. Mariners are urged to transit with extreme caution in the vicinity of the bridge center span. Position 30-23.65N 086-31.02W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-505FC9SÉCURITÉNEW ORLEANS HARBOR - NEW ORLEANS TO BATON ROUGE General / Marine Construction (Excluding Bridges) / Dredging Mississippi River - Dredging Operation --- --- The Dredge BELLA ROSE will be conducting dredging at Mile 124.5, RDB, AHOP. Work will take place 24-hours a day, 7-days a week. Mariners are requested to transit the area with caution. VHF-FM Channels: 67, POC: (504) 225-2036 or (504) 858-2925 Valid 2026-11-04 to 2026-11-20. Position 29-58.62N 090-23.98W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-0D1453SÉCURITÉSECTOR NEW ORLEANS, EXCLUSIVE ECONOMIC ZONE (EEZ) General / Marine Construction (Excluding Bridges) / Survey Operations Gulf of America - Survey Operation --- --- The R/V BROOKS MCCALL will be conducting geophysical operations in the offshore waters of Louisiana, from the Bay Marchand Area to the South Timbalier South Addition Areas. Geophysical survey data will be collected along a planned pipeline route in an area bound by the following approximate positions: 29-02.29N 090-14.88W, 29-02.27N 090-11.62W, 28-55.65N 090-12.14W, 28-40.32N 090-20.31W, 28-15.34N 090-42.69W, 28-17.26N 090-46.34W, 28-28.83N 090-37.67W, 28-39.77N 090-28.30W, 28-48.13N 090-20.91W and 28-53.63N 090-17.00W. Operations will be conducted 24-hours a day, 7-days a week. The research vessel will tow survey sensors and will be restricted in maneuverability. Mariners are requested to maintain a one mile closest point of approach. VHF-FM Channels: 13 and 16 Valid 2026-11-20 to 2027-01-19. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-66E97BSÉCURITÉVICTORIA WEST ENTRANCE CHANNEL - SAN ANTONIO BAY General / Marine Construction (Excluding Bridges) / Dredging GIWW - Dredge Pipeline Crossing --- --- The Dredge VANETA MARIE and attendant plant will install a dredge subline across the GIWW, near Mile 493.2, WHL. A 4-hour closure window may be required for the initial installation and removal of the subline. Additional subline will be laid outside of the channel boundaries and parallel to the waterway. Additional on-scene vessels will include the M/Vs ACADIA, SAGUARO, JAY EM and LITTLE BIGHORN. Mariners are urged to transit the area with extreme caution and coordinate passing arrangements with the dredge at least 1-hour in advance. VHF-FM Channels: 13, 16 and 20, POC: (337) 607-9930 Valid 2026-11-03 to 2026-11-15. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, EXCLUSIVE ECONOMIC ZONE (EEZ) General / Autonomous Vessel Operations Gulf of America - Unmanned Surface Vessel Operation --- --- Unmanned surface vessels will conduct surveys in the Gulf of America in an area bound by approximate positions: 29-09.70N 085-53.60W, 29-16.20N 085-44.60W, 29-10.80N 085-38.60W, 29-12.00N 085-37.70W, 28-59.90N 085-22.20W and 28-53.00N 085-28.10W. Two 10 meter Saildrone USVs (SD-2056 and SD-2065) will launch on or near November 3, 2026, approximately 5 nm seaward of St Andrew Bay Entrance Lighted Buoy 1 (LLNR-3350) and transit south, remaining outside charted fairways and only crossing when vessel traffic is clear. A third Saildrone USV (SD-2022) will launch from the same area on or near November 10, 2026. Pre-survey testing will be conducted in areas along the route to the designated survey areas. The USVs will be equipped with AIS, radar, cameras, and sensors tied into an onboard collision avoidance system. The USVs will be monitored 24-hours a day, 7-days a week, by qualified Remote Vessel Pilots. The USV systems will operate on pre-planned routes but allow for immediate manual intervention by a remote operator for course or speed changes to ensure safe navigation. Mariners are urged to maintain a wide berth from the operating USVs and can contact the Saildrone Remote Operations Center at (510) 722-6070 for additional information. Valid 2026-11-03 to 2027-04-15. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, EXCLUSIVE ECONOMIC ZONE (EEZ) General / Autonomous Vessel Operations Gulf of America - Unmanned Surface Vessel Operation --- --- Unmanned surface vessels will conduct surveys in the Gulf of America in an area bound by approximate positions: 28-56.80N 084-45.50W, 28-59.20N 084-36.10W, 28-59.20N 084-25.90W, 28-50.70N 084-22.70W, 28-50.30N 084-00.10W, 28-45.80N 083-56.60W, 28-41.50N 084-04.50W, 28-43.80N 084-09.40W, 28-44.00N 084-26.60W and 28-36.80N 084-26.60W. Two 10 meter Saildrone USVs (SD-2056 and SD-2065) will launch on or near November 3, 2026, approximately 5 nm seaward of St Andrew Bay Entrance Lighted Buoy 1 (LLNR-3350) and transit south, remaining outside charted fairways and only crossing when vessel traffic is clear. A third Saildrone USV (SD-2022) will launch from the same area on or near November 10, 2026. Pre-survey testing will be conducted in areas along the route to the designated survey areas. The USVs will be equipped with AIS, radar, cameras, and sensors tied into an onboard collision avoidance system. The USVs will be monitored 24-hours a day, 7-days a week, by qualified Remote Vessel Pilots. The USV systems will operate on pre-planned routes but allow for immediate manual intervention by a remote operator for course or speed changes to ensure safe navigation. Mariners are urged to maintain a wide berth from the operating USVs and can contact the Saildrone Remote Operations Center at (510) 722-6070 for additional information. Valid 2026-11-03 to 2027-04-15. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- EAST BAY TO WEST BAY - ST ANDREW BAY General / Naval Activity / Naval Testing (Surface / Underwater) Saint Andrew Bay - U.S. Navy Operation --- --- The U.S. Navy will conduct surface vehicle testing operations in Saint Andrew Bay, southwest of GIWW Mile 285.0, EHL, near approximate position 30-10.75N 085-44.63W. Five temporary yellow buoys with a flashing amber light at night and an orange flag will be installed in the area for the testing. Surface vehicles will be on-site starting November 16, 2026. Testing vehicles and buoys will be in the area 24-hours a day, 7-days a week. Mariners are requested to transit the area at their slowest safe speed to minimize wake and should maintain a safe distance from the operating area. VHF-FM Channels: 13, 16, 81 and 82 Valid 2026-11-03 to 2026-11-20. Position 30-10.75N 085-44.63W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, SUBMERGED LAND ACT (SLA) - MISSISSIPPI SOUND General / Autonomous Vessel Operations Mississippi Sound - Unmanned Surface Vessel Testing --- --- Unmanned surface vessel (USV) testing will be conducted in the Mississippi Sound, east of the Gulfport Ship Channel. Operations will be conducted Monday through Friday, from 6:30 a.m. to 5:30 p.m. Between two and three USVs will be operating in various testing sites throughout the operational period. A chase boat will be assigned to each USV. Mariners should maintain at least a 0.5 nautical mile closest point of approach from the operating USVs and transit the area with caution. VHF-FM Channel: 16, POC: (843) 385-1341 Valid 2026-11-02 to 2026-11-20. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR NEW ORLEANS, SUBMERGED LAND ACT (SLA) - BRETON/CHANDELEUR ICW ALTERNATE ROUTE General / Autonomous Vessel Operations Chandeleur Sound - Unmanned Surface Vessel Testing --- --- Unmanned surface vessel (USV) testing will be conducted in Chandeleur Sound, southwest of the Gulfport Ship Channel. Operations will be conducted Monday through Friday, from 6:30 a.m. to 5:30 p.m. Between two and three USVs will be operating in various testing sites throughout the operational period. A chase boat will be assigned to each USV. Mariners should maintain at least a 0.5 nautical mile closest point of approach from the operating USVs and transit the area with caution. VHF-FM Channel: 16, POC: (843) 385-1341 Valid 2026-11-02 to 2026-11-20. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, TERRITORIAL SEA - SECTOR MOBILE, SUBMERGED LAND ACT (SLA) General / Autonomous Vessel Operations Gulf of America - Gulfport Ship Channel - Unmanned Surface Vessel Testing --- --- Unmanned surface vessel (USV) testing will be conducted in the Gulf of America near the Gulfport Ship Channel. Operations will be conducted Monday through Friday, from 6:30 a.m. to 5:30 p.m. Between two and three USVs will be operating in various testing sites throughout the operational period. A chase boat will be assigned to each USV. Mariners should maintain at least a 0.5 nautical mile closest point of approach from the operating USVs and transit the area with caution. VHF-FM Channel: 16, POC: (843) 385-1341 Valid 2026-11-02 to 2026-11-20. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, SUBMERGED LAND ACT (SLA) - MISSISSIPPI SOUND General / Autonomous Vessel Operations Mississippi Sound - Unmanned Surface Vessel Testing --- --- Unmanned surface vessel (USV) testing will be conducted in the Mississippi Sound, west of the Gulfport Ship Channel. Operations will be conducted Monday through Friday, from 6:30 a.m. to 5:30 p.m. Between two and three USVs will be operating in various testing sites throughout the operational period. A chase boat will be assigned to each USV. Mariners should maintain at least a 0.5 nautical mile closest point of approach from the operating USVs and transit the area with caution. VHF-FM Channel: 16, POC: (843) 385-1341 Valid 2026-11-02 to 2026-11-20. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, EXCLUSIVE ECONOMIC ZONE (EEZ) General / Autonomous Vessel Operations Gulf of America - Autonomous Vessel Testing --- --- The Autonomous Surface Vessel (ASV) SEA ARCHER will conduct daily tests with the escort vessel GUNSLINGER in the Gulf of America. Operations will be conducted from sunrise to sunset, daily. The ASV will operate in one of three testing areas. The offshore testing area east of the Chandeleur Islands will be bound by approximate positions: 30-01.82N 088-44.60W, 30-01.82N 088-13.42W, 29-34.82N 088-13.42W and 29-34.82N 088-44.47W. The escort vessel will remain within 500 meters of the ASV at all times. Mariners are requested to maintain a 0.5 nautical mile closest point of approach from the ASV SEA ARCHER and can contact M/V GUNSLINGER for questions regarding the operation. VHF-FM Channels: 13 and 16, POC: (619) 871-8825 Valid 2026-11-01 to 2026-12-31. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, SUBMERGED LAND ACT (SLA) - MISSISSIPPI SOUND General / Autonomous Vessel Operations Mississippi Sound - Autonomous Vessel Testing --- --- The Autonomous Surface Vessel (ASV) SEA ARCHER will conduct daily tests with the escort vessel GUNSLINGER in the Mississippi Sound. Operations will be conducted from sunrise to sunset, daily. The ASV will operate in one of three testing areas. The inshore testing area will be bound by approximate positions: 30-20.95N 089-04.57W, 30-22.76N 088-53.15W, 30-18.97N 088-48.22W, 30-16.06N 088-48.07W, 30-14.11N 088-59.16W and 30-16.01N 089-00.13W. The escort vessel will remain within 500 meters of the ASV at all times. Mariners are requested to maintain a 0.5 nautical mile closest point of approach from the ASV SEA ARCHER and can contact M/V GUNSLINGER for questions regarding the operation. VHF-FM Channels: 13 and 16, POC: (619) 871-8825 Valid 2026-11-01 to 2026-12-31. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, EXCLUSIVE ECONOMIC ZONE (EEZ) - SECTOR MOBILE, TERRITORIAL SEA General / Autonomous Vessel Operations Gulf of America - Autonomous Vessel Testing --- --- The Autonomous Surface Vessel (ASV) SEA ARCHER will conduct daily tests with the escort vessel GUNSLINGER in the Gulf of America. Operations will be conducted from sunrise to sunset, daily. The ASV will operate in one of three testing areas. The offshore testing area south of the Mississippi barrier islands will be bound by approximate positions: 30-12.00N 088-57.58W, 30-13.72N 088-52.15W, 30-13.72N 088-41.73W, 30-12.38N 088-35.12W, 30-01.82N 088-35.12W and 30-01.82N 088-47.75W. The escort vessel will remain within 500 meters of the ASV at all times. Mariners are requested to maintain a 0.5 nautical mile closest point of approach from the ASV SEA ARCHER and can contact M/V GUNSLINGER for questions regarding the operation. VHF-FM Channels: 13 and 16, POC: (619) 871-8825 Valid 2026-11-01 to 2026-12-31. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR NEW ORLEANS, EXCLUSIVE ECONOMIC ZONE (EEZ) ATON / ATON Changes Location: 28-28.65N 091-26.45W Aid Name: Energy XXI-101-18 LLNR: Not Provided Action: DISCONTINUE Platform: remove platform obstruction symbol. Valid 2026-10-30 to 2026-11-12. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR NEW ORLEANS, EXCLUSIVE ECONOMIC ZONE (EEZ) ATON / ATON Changes Location: 28-28.53N 091-26.21W Aid Name: Energy XXI-101-18 (Lighted Buoy) LLNR: Not Provided Action: ESTABLISH Private Aid: Buoy, W/O, FL 2.5s Valid 2026-10-30 to 2026-11-12. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, SUBMERGED LAND ACT (SLA) - ST JOSEPH BAY ENTRANCE ATON / Advanced Notice of Change The Coast Guard will make the following Aids to Navigation Change after December 08, 2026. Change St Joseph Bay Entrance Range B Front Light (LLNR-3060) in position 29-53.73N 085-23.07W, from showing Q R, 29ft, 5NM, KRW on pile, visible all around; higher intensity on rangeline. AIS: MMSI 993682493 to show Q R, 29ft, KRW on pile, visible all around. Position 29-53.73N 085-23.07W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- NEW ORLEANS HARBOR - NEW ORLEANS TO BATON ROUGE ATON / Advanced Notice of Change The Coast Guard will make the following Aids to Navigation Change after December 22, 2026. Change Old Hermitage Range Front Light (LLNR-15210) in position 30-18.65N 091-09.95W, from showing Iso R 2s, KRW on skeleton tower, visible all around; higher intensity on rangeline. Lighted nighttime only to show Iso R 2s, KRW on skeleton tower, visible all around. Position 30-18.65N 091-09.95W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- CORPUS CHRISTI CHANNEL - TULE LAKE CHANNEL ATON / Proposed Notice of Change In order to provide a more efficient and effective Aids to Navigation signal, the Coast Guard is proposing the following Aids to Navigation Change: Change Tule Lake Channel Directional LT D (LLNR-28870) in position 27-49.72N 097-29.85W, from showing F W, 40ft, on skeleton tower, Shows Fl G from 298.6° to 298.0°; F G from 298.0° to 297.5°; Alternating GW from 297.5° to 296.9°; F W (on channel line) from 296.9° to 296.5°; Alternating RW from 296.5° to 295.9°; F R from 295.9° to 295.5°;Fl R from 295.5° to 294.9° to show, F W, 40ft, on skeleton tower, Shows Fl G from 298.5° to 297.9°; F G from 297.9° to 297.5°; Alternating GW from 297.5° to 296.9°; F W (on channel line) from 296.9° to 296.5°; Alternating RW from 296.5° to 295.9°; F R from 295.9° to 295.5°;Fl R from 295.5° to 294.9°; Lighted throughout 24 hours. Comments will be taken until December 22, 2026. Please email comments regarding this proposal to: [email protected] Position 27-49.72N 097-29.85W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR HOUSTON-GALVESTON, SUBMERGED LAND ACT (SLA) - CALCASIEU CHANNEL ATON / Advanced Notice of Change The Coast Guard will make the following Aids to Navigation Change after December 08, 2026. Change Calcasieu Channel D Range Rear Light (LLNR-21750) in position 30-06.16N 093-19.43W, from showing skeleton tower on piles, night: Visible only on the rangeline. Day: Light visible only on rangeline. AIS: MMSI 993682019 to show Iso R 6s (NIGHT), and Iso W 6s (DAY), 63ft (NIGHT) and 60ft (DAY), skeleton tower on piles, visible 1.5° each side of rangeline. Position 30-06.15N 093-19.43W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-DACEA5SÉCURITÉLAKE SALVADOR - BAYOU PEROT General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Little Lake - Bayou Perot - Marsh Creation and Dredging --- --- Marsh creation operations will be conducted in Little Lake along the western shoreline. Operations will consist of dredging, the creation of containment dikes, and back filling. Work will be conducted daily, from 6:00 a.m. to 6:00 p.m. On-scene vessels and equipment will include dredge pipe, the T/Vs MR. TIM, JOHN OUZTS, and TINA, and the Dredge SANDRA G. Mariners are urged to transit the area at their slowest safe speed to minimize wake and proceed with caution. VHF-FM Channel: 16 Valid 2026-11-01 to 2028-08-30. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- NEW ORLEANS HARBOR - NEW ORLEANS TO BATON ROUGE ATON / Advanced Notice of Change The Coast Guard will make the following Aids to Navigation Change after December 22, 2026. Change Old Hermitage Range Rear Light (LLNR-15215) in position 30-18.61N 091-09.83W, from showing Iso R 6s, KRW on skeleton tower, visible all around; higher intensity on rangeline. Lighted nighttime only to show Iso R 6s, KRW on skeleton tower, visible all around. Position 30-18.62N 091-09.83W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR NEW ORLEANS, TERRITORIAL SEA - SECTOR NEW ORLEANS, SUBMERGED LAND ACT (SLA) General / Hazards To Navigation / Hazards Schooner Bayou Control Structure - Waterway Condition/Lock Closure --- Reported: 2026-10-27 --- Due to low water and high salinity levels in the Mermentau Basin, the Schooner Bayou Control Structure is closed until further notice. All vessels must use Leland Bowman Lock as an alternate route. The Lockmaster can be contacted for additional information at (337) 737-2470 or (337) 316-3662. Position 29-45.48N 092-15.83W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, TERRITORIAL SEA - SECTOR MOBILE, SUBMERGED LAND ACT (SLA) ATON / Proposed Notice of Change In order to provide a more efficient and effective Aids to Navigation signal, the Coast Guard is proposing the following Aids to Navigation Change: Change Horn Island Pass Entrance Range Rear Light (LLNR-7900) in position 30-13.46N 088-29.70W, from showing Iso W 6s, 94ft, skeleton tower on piles, visible 2° each side of range line to show Iso W 6s, 94ft, skeleton tower on piles, Night: visible 1.5° each side of rangeline. Day: visible 1° each side of rangeline. Lighted throughout 24 hours. Comments will be taken until December 15, 2026. Please email comments regarding this proposal to: [email protected] Position 30-13.45N 088-29.70W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR HOUSTON-GALVESTON, SUBMERGED LAND ACT (SLA) - CALCASIEU CHANNEL ATON / Advanced Notice of Change The Coast Guard will make the following Aids to Navigation Change after December 08, 2026. Change Calcasieu Channel D Range Front Light (LLNR-21740) in position 30-05.76N 093-19.47W, from showing Iso R 2s, 31ft, skeleton tower on piles, night: Visible 2° each side of rangeline, day: Light visible only on rangeline. AIS: MMSI 993682018 to show Iso R 2s (NIGHT), and Iso W 2s (DAY), 31ft (NIGHT) and 34ft (DAY), skeleton tower on piles, night: Visible 1.5° each side of rangeline, day: Light visible only on rangeline. Position 30-05.77N 093-19.47W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, SUBMERGED LAND ACT (SLA) - ST JOSEPH BAY ENTRANCE ATON / Advanced Notice of Change The Coast Guard will make the following Aids to Navigation Change after December 08, 2026. Change St Joseph Bay Entrance Range B Rear Light (LLNR-3065) in position 29-53.75N 085-22.25W, from showing Iso R 6s, 53ft, KRW on pile, visible on rangeline only to show Iso R 6s, 53ft, KRW on pile, visible 4° each side of rangeline. Position 29-53.75N 085-22.25W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- TOMBIGBEE RIVER General / Bridges / Closure (Scheduled Or Emergency) Tombigbee River - Naheola Railroad Bridge Closure --- Reported: 2026-10-13 --- The MNBR Naheola Bridge on the Tombigbee River, Mile 173.0, near Myrtlewood, AL, has been reported unable to open for vessel traffic. Mariners requiring a bridge opening should anticipate delays and are encouraged to contact MNBR for the most current bridge status and operating schedule. Vessels that do not require a drawbridge opening may transit beneath the bridges, subject to available vertical clearance and safe navigation conditions. Mariners may contact the MNBR Naheola Bridge Operator at (601) 383-2216 for bridge updates. Position 32-14.27N 088-00.93W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, TERRITORIAL SEA - SECTOR MOBILE, SUBMERGED LAND ACT (SLA) ATON / Proposed Notice of Change In order to provide a more efficient and effective Aids to Navigation signal, the Coast Guard is proposing the following Aids to Navigation Change: Change Horn Island Pass Entrance Range Front Light (LLNR-7895) in position 30-12.83N 088-30.33W, from showing Fl W 2.5s, 26ft, visible 2° each side of rangeline to show Fl W 2.5s, 26ft, Night: visible 1.5° each side of rangeline. Day: visible 1° each side of rangeline. Lighted throughout 24 hours. Comments will be taken until December 15, 2026. Please email comments regarding this proposal to: [email protected] Position 30-12.83N 088-30.33W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, EXCLUSIVE ECONOMIC ZONE (EEZ) - SECTOR MOBILE, TERRITORIAL SEA General / LAA / RNA / Safety Zone Gulf of America - Pascagoula Anchorage - Safety Zone --- --- The U.S. Coast Guard has established a temporary Safety Zone in the Pascagoula Anchorage in the Gulf of America for the M/T KALAHARI while the vessel conducts repairs at anchorage. The Safety Zone encompasses all navigable waters from surface to bottom within a 1,000 meter radius of position 30-05.53N 088-24.96W. The Safety Zone will be enforced while the M/T KALAHARI is anchored at the above location. Entry into this zone by vessels or persons is prohibited unless specifically authorized by the U.S. Coast Guard Captain of the Port Mobile or the Captain of the Port’s designated representative. Mariners seeking permission to enter the Safety Zone may contact the U.S. Coast Guard on VHF-FM Channel 16 or by telephone at (251) 266-5888. Concerned parties may report any hazardous conditions to the U.S. Coast Guard Sector Mobile Command Center at (251) 266-5888 or Waterways Management Division at (251) 382-8653. Valid 2026-10-28 to 2026-12-27. Position 30-05.53N 088-24.95W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR MOBILE, EXCLUSIVE ECONOMIC ZONE (EEZ) General / Naval Activity / Naval Testing (Surface / Underwater) Gulf of America - U.S. Navy Operation --- --- The U.S. Navy will conduct underwater autonomous vehicle testing operations in the Gulf of America, within a 3 nautical mile radius of approximate position 29-42.23N 085-50.23W. Operations will be conducted 24-hours a day, 7-days a week. A buoy field, consisting of 16 temporary buoys, will be in the operating area 24-hours a day. The R/V ORACLE will be on-site guarding the buoy field at all times. Additional on-scene vessels will include the M/Vs PATRIOT, PSC-01, PSC-05, and PSC-12. Operations may extend into the nearby Safety Fairway; however, operations will pause for shipping traffic. Mariners are urged to maintain a 1 mile closest point of approach from the operating area and take all direction from naval operators. VHF-FM Channel: 16 Valid 2026-11-07 to 2026-11-22. Position 29-42.23N 085-50.23W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR HOUSTON-GALVESTON, SUBMERGED LAND ACT (SLA) General / Hazards To Navigation / Obstructions GIWW - Damaged Bridge Fender --- Reported: 2026-10-22 --- The High Island Bridge is reported to have the east side of the south fender damaged and protruding approximately 10ft into the channel, near Mile 319.6, WHL, on October 22, 2026. The east side damaged bridge fender is reportedly not marked. Mariners are urged to transit the area with caution. Position 29-35.68N 094-23.32W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- THE RIGOLETS - LAKES PONTCHARTRAIN AND MAUREPAS General / Bridges / Closure (Scheduled Or Emergency) Lake Pontchartrain - Lake Saint Catherine - Bridge Closure --- --- The Norfolk Southern Railroad will be installing new parts on the railroad drawbridge across Lake Pontchartrain, Mile 4.8, near Slidell, LA. The drawbridge will not open to vessels from 7:00 a.m. to 11:00 a.m., and again from 1:00 p.m. to 5:00 p.m., each day. The drawbridge will operate according to regulations at all other times and will be in the raised position. Mariners are urged to plan accordingly and transit the area with caution. Valid 2026-11-10 to 2026-11-12. Position 30-11.22N 089-50.95W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- MOBILE CHANNEL - THEODORE SHIP CHANNEL General / Hazards To Navigation / Shoaling Reported Theodore Ship Channel - Draft Restrictions/Shoaling --- Reported: 2026-10-19 --- Recent soundings conducted by the U.S. Army Corps of Engineers, Mobile District, indicate areas of reduced depth in the Theodore Ship Channel. As a result, a draft limitation of 37 ft is now in effect for vessels transiting the Theodore Ship Channel. The USACE will be dredging the Theodore Ship Channel this winter. Survey updates can be found at: https://www.arcgis.com/apps/dashboards/4b8f2ba307684cf597617bf1b6d2f85d# USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- HOUSTON SHIP CHANNEL - SAN JACINTO RIVER General / Bridges / Repairs, Painting, Or Fender Replacement San Jacinto River - Houston Ship Channel - Bridge Rehabilitation --- --- The I-10 Fixed Bridge across the San Jacinto River in Channelview, TX, will be rehabilitated and repainted. Work will take place each night, Sunday through Thursday, from 9:00 p.m. to 5:00 a.m., the following day. During work, a snooper truck will be deployed below the bridge. When working in the main channel, the truck will be removed when marine traffic is approaching the bridge to allow vessels to pass underneath. Mariners should contact the work supervisor on VHF-FM Channel 10 to coordinate passing arrangements. POC: (254) 640-6123 Valid 2026-11-30 to 2027-01-21. Position 29-47.55N 095-03.67W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-495067SÉCURITÉPORT MANSFIELD CHANNEL - LAND CUT-ARROYO COLORADO General / Marine Construction (Excluding Bridges) / Dredging GIWW - Dredge Operation --- --- The Dredge CONSTELLATION will conduct non-continuous maintenance dredging in the GIWW, between Miles 577.0 and 629.0, WHL. Work will take place 24-hours a day, 7-days a week. Dredged material will be pumped through pipeline to various open water disposal sites along the GIWW. Additional on-scene vessels and equipment will include 10,000 ft of dredge pipe, an anchor barge, a crane barge, two deck barges, a landing barge, a fuel barge, and the T/Vs DAVID LUNDIN and CHARLIE B. The dredge will obstruct portions of the channel while working. Vessels should coordinate with the dredge at least 45-minutes in advance to ensure equipment can be moved from the channel. Mariners are urged to avoid meeting or overtaking near the dredge and should transit the area at their slowest safe speed to minimize wake. VHF-FM Channels: 13, 16 and 79, POC: (713) 913-7208 Valid 2026-10-27 to 2027-04-07. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- SECTOR NEW ORLEANS, EXCLUSIVE ECONOMIC ZONE (EEZ) - SECTOR NEW ORLEANS, TERRITORIAL SEA General / Autonomous Vessel Operations Gulf of America - Survey Drone Operations --- --- An unmanned survey drone will be operating approximately 8 nautical miles south of Port Fourchon in an area bound by approximate positions: 28-58.14N 090-15.12W, 28-57.35N 090-12.20W, 28-49.30N 090-14.54W and 28-50.36N 090-17.33W. The unmanned drone features a 5 foot keel and a wing used for sailing in approximately 7 ft of water. Mariners are urged to exercise caution when transiting in this area and should maintain a wide berth from the operating craft. POC: (501) 317-6389 Valid 2026-10-27 to 2026-11-27. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-0C3A15SÉCURITÉSECTOR NEW ORLEANS, TERRITORIAL SEA - SECTOR NEW ORLEANS, SUBMERGED LAND ACT (SLA) General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Vermillion River - Debris Removal --- --- A U.S. Government Maintenance Unit will be performing debris removal operations in the Vermilion River, from Mile 50.0 to Mile 0.0. Operations will take place during daylight hours, daily. Vessels should contact the maintenance unit personnel prior to transiting the area to coordinate passing arrangements. Mariners are urged to transit at their slowest safe speed to minimize wake and proceed with caution. VHF-FM Channel: 13, POC: (504) 862-2373 Valid 2026-10-23 to 2027-06-01. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-562C9FSÉCURITÉSECTOR NEW ORLEANS, TERRITORIAL SEA - SECTOR NEW ORLEANS, SUBMERGED LAND ACT (SLA) General / Marine Construction (Excluding Bridges) / Facilities, Barriers, Manmade Reefs, Riprap, Jetties / Dikes Bayou Segnette - Marine Construction --- --- Canal backfilling will be conducted in a canal located near Bayou Segnette, Miles 8.0 through 10.0, near approximate position 29-51.61N 090-09.60W. Operations will consist of the deconstruction of four spoil banks and the construction of baffles at the canal entrances along Bayou Segnette. Work will be conducted during daylight hours, daily. On-scene vessels will include one airboat, a flatboat, a spud barge, three amphibious excavators, and the T/V ELLA R. Mariners are urged to transit the area with caution and at their slowest safe speed to minimize wake. VHF-FM Channel: 11 Valid 2026-10-22 to 2027-04-01. Position 29-51.75N 090-09.68W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-C9D72CSÉCURITÉSECTOR CORPUS CHRISTI, SUBMERGED LAND ACT (SLA) - BRAZOS SANTIAGO PASS General / Marine Construction (Excluding Bridges) / Dredging Brazos Santiago Entrance Channel - Barracuda Bay – Staging Area --- --- A staging area for assembled dredge subline and dredging equipment will be located south of the Brazos Santiago Entrance Channel in approximate position 26-03.76N 097-09.50W. Project vessels will move assembled subline from the staging area to the offshore subline area. Additional dredge equipment may be in the area throughout the Brazos Santiago Entrance Channel dredge project. On-scene vessels will include the M/V CJ, JACK K, and CAPT BOUDREAUX, and the Crew Boats COLONEL and NANCY M. Mariners are requested to transit the area at their slowest safe speed to minimize wake and should provide a wide berth to vessels towing subline. VHF-FM Channels: 13, 16, 66 and 67 Valid 2026-10-19 to 2026-11-30. Position 26-03.77N 097-09.50W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-63BC84SÉCURITÉTOMBIGBEE RIVER General / Marine Construction (Excluding Bridges) / Dredging Tombigbee River - Dredge Operation --- To: Late November/Early December 2026 --- The Dredge AMERICA and associated fleet will be performing dredging operations in the Tombigbee River, near Mile 83.0 (Salt Creek). Operations will be conducted 24-hours per day, 7-days per week. Dredged material will be placed in the permitted in-bank disposal areas. Navigation traffic should contact the dredge prior to passing through the area. Mariners are urged to transit with caution and at their slowest safe speed to minimize wake. VHF-FM Channel: 16, POC: (205) 752-3571 Valid 2026-10-19 until further notice. Position 31-25.38N 087-54.73W USCG Heartland (Gulf) District Local Notice to Mariners 45/2026
- LNM08G-49AFEDSÉCURITÉSECTOR CORPUS CHRISTI, TERRITORIAL SEA - SECTOR CORPUS CHRISTI, SUBMERGED LAND ACT (SLA) General / Marine Construction (Excluding Bridges) / Dredging Gulf of America - Subline Operations --- --- Subline will be placed perpendicular to the beach on South Padre Island for the Brazos Santiago Pass dredge project. The subline will extend from shore to approximately 1 nm offshore, between approximate positions 26-08.04N 097-10.06W and 26-08.20N 097-08.98W. Assembled sections of subline will be towed from staging areas inshore to the subline area in the Gulf. The full subline is expected to be installed by November 13, 2026, but will remain in the area for the duration of the Brazos Santiago Entrance Channel dredge project. On-scene vessels will include the M/V CJ, JACK K, and CAPT BOUDREAUX and the Crew Boats COLONEL and NANCY M. Mariners are urged to avoid the subline area and are requested to provide a wide berth to vessels towing subline. VHF-FM Channels: 13, 16, 66 and 67 Valid 2026-10-19 to 2026-11-30. USCG Heartland (Gulf) District Local Notice to Mariners 45/2026