Question 1

Where is CGC WILLIAM CHADWICK right now?

Accepted Answer

CGC WILLIAM CHADWICK has not broadcast an AIS position for 13 days. The most recent broadcast placed it in the North Atlantic Ocean, on 26 Aug 2026, 14:47 UTC. It was sailing from BOSTON to BOSTON. Vessels stop appearing on terrestrial AIS when they move beyond receiver range, so a gap does not necessarily mean the vessel is inactive.

Question 2

What are the identifiers for CGC WILLIAM CHADWICK?

Accepted Answer

CGC WILLIAM CHADWICK broadcasts MMSI 338926450, with call sign NWMC. 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.

Question 3

What type of ship is CGC WILLIAM CHADWICK?

Accepted Answer

CGC WILLIAM CHADWICK is classified as a law enforce vessel registered under the US flag. The vessel-type classification is derived from the AIS Type field broadcast by the ship's transponder; full law enforce fleet at /vessel-type/military-special and full US flag list at /flag/us.

Question 4

How can I see the live position of CGC WILLIAM CHADWICK?

Accepted Answer

MarineRadar shows the latest AIS broadcast from CGC WILLIAM CHADWICK 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.

Question 5

How often is CGC WILLIAM CHADWICK's position updated?

Accepted Answer

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.

Question 6

What class is CGC WILLIAM CHADWICK?

Accepted Answer

As a law enforce, CGC WILLIAM CHADWICK sits in the same design class as the other law enforces listed in the Similar Vessels section of the vessel page, or in the full law enforce directory at /vessel-type/military-special.

CGC WILLIAM CHADWICK — Law Enforce · MMSI 338926450

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