LNM11-A4D87A
SÉCURITÉReceived 23 Sept 2026, 00:00 UTCArchived 01 Nov 2026, 15:03 UTC
Warning text
SECTOR LOS ANGELES, TERRITORIAL SEA
General / Marine Construction (Excluding Bridges) / Survey Operations
The USGS Pacific Coastal and Marine Science Center (PCMSC) will conduct geophysical surveys in the San Luis Bay region under California State Lands Permit #9967 from September 26 to October 9, 2026. Operations will include high-resolution acoustic sub-bottom surveys using a Chirp 512 on the M/V Bold Horizon, a 170-foot research vessel owned and operated by the Eclipse Group. The survey area is bounded by the coordinates listed below. For more information, contact Tim Elfers, Marine Operations Manager, USGS Pacific Coastal Marine Science Center, at 831-332-9665 or 831-460-7479. Coordinates: Latitude Longitude 35.505784 -121.092370 35.409833 -121.010279 35.417182 -120.905934 35.406975 -120.897280 35.326948 -120.899258 35.258353 -120.938820 35.106057 -120.822607 35.142191 -120.752137 35.170976 -120.755846 35.177918 -120.746450 35.146478 -120.656942 34.947431 -120.682657 34.832494 -120.714306 34.835353 -120.758319 35.269581 -121.002614 35.476590 -121.137124 35.505784 -121.092370 All mariners are advised to transit the area with caution.
USCG Southwest District Local Notice to Mariners 40/2026