LNM11-379A50
Received 28 Oct 2026, 00:00 UTCArchived 04 Nov 2026, 18:23 UTC
Warning text
Positions open on the mapLOS ANGELES MAIN CHANNEL - LOS ANGELES OUTER HARBOR
General / Miscellaneous
Mariners should be aware of possible short-term degradation to Global Positioning System (GPS) information. This degradation may occur while operating in and around Daggett, CA. The testing will be centered at approximately 35-21.77N 116-32.35W, with potential impacts extending out to range of 50 ft above ground level with 133 nautical miles distance. The testing is scheduled for the following dates and times (Pacific Daylight Time): October 20, 2026: 9:30 a.m. – 3:29 p.m. October 21, 2026: 9:30 a.m. – 12:59 p.m. October 23, 2026: 9:30 a.m. – 12:59 p.m. October 24 - 31, 2026: 11:00 p.m. (previous day) – 5:59 a.m. & 9:30 a.m. – 3:29 p.m. November 1, 2026: 12:00 a.m. – 6:59 a.m. & 10:00 a.m. – 3:29 p.m. In the unlikely event that mariners experience an anomaly with GPS or AIS, mariners are advised to notify their local Coast Guard Sector Command Center immediately. For more details or comments, contact the NAVCEN NIS Watch at (866) 944-5748 or [email protected]. All mariners are advised to maintain an increased awareness in the area.
USCG Southwest District Local Notice to Mariners 43/2026