HENRY LARSEN — SAR · IMO 8409329

HENRY LARSEN has not broadcast an AIS position for 13 days. The most recent broadcast placed it in the North Pacific Ocean, on 24 Oct 2026, 19:47 UTC. It was sailing from ST JOHNS to ST JOHNS. Vessels stop appearing on terrestrial AIS when they move beyond receiver range, so a gap does not necessarily mean the vessel is inactive.

HENRY LARSEN broadcasts MMSI 316013000 and is registered as IMO 8409329, with call sign CGHL. The MMSI is the radio identifier used by AIS; the IMO number stays with the ship for life and does not change with re-flagging or sale.

HENRY LARSEN is classified as a sar vessel registered under the CA flag. The vessel-type classification is derived from the AIS Type field broadcast by the ship's transponder; full sar fleet at /vessel-type/tug-pilot-vessel and full CA flag list at /flag/ca.

MarineRadar shows the latest AIS broadcast from HENRY LARSEN above, with current position, course, speed, and navigation status. Tap "View on map" to centre the live tracker on the vessel and watch its movement update in real time. The same data is available offline-friendly in the iOS and Android apps.

AIS transponders broadcast position every 2 seconds when underway at high speed and up to every 3 minutes at anchor. The position you see refreshes whenever the ship is in range of a coastal AIS receiver or a satellite pass — typically seconds in coastal waters and minutes offshore.

As a sar, HENRY LARSEN sits in the same design class as the other sars listed in the Similar Vessels section of the vessel page, or in the full sar directory at /vessel-type/tug-pilot-vessel.