LNM01-662469
Received 23 Sept 2026, 00:00 UTC
Warning text
Positions open on the mapPORTSMOUTH TO CAPE ANN - PLUM ISLAND SOUND
General / Hazards To Navigation / Shoaling Reported
Newburyport Harbor and Plum Island Sound – Plum Island Sound Entrance has experienced an increase in shoaling between Plum Island Sound Entrance Buoy 6 and 8. The shoaling was observed in approx. position 42-41.365N /070-45.169W and extends 100 yards west following the channel. Mariners are advised that at MLLW depths of 3' could be seen. Mariners without local knowledge are advised to transit with extreme caution and monitor tidal stations prior to transiting.
USCG Northeast District Local Notice to Mariners 45/2026