USNS SGT.WILLIAM R.BUTTON — Cargo · IMO 8302466

USNS SGT.WILLIAM R.BUTTON has not broadcast an AIS position for 127 days. The most recent broadcast placed it in the Caribbean Sea, on 4 Jul 2026, 18:37 UTC. It was sailing from JACKSONVILLE to JACKSONVILLE. Vessels stop appearing on terrestrial AIS when they move beyond receiver range, so a gap does not necessarily mean the vessel is inactive.

USNS SGT.WILLIAM R.BUTTON broadcasts MMSI 367370000 and is registered as IMO 8302466, with call sign NWRB. 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.

USNS SGT.WILLIAM R.BUTTON is classified as a cargo vessel registered under the US flag. The vessel-type classification is derived from the AIS Type field broadcast by the ship's transponder; full cargo fleet at /vessel-type/cargo and full US flag list at /flag/us.

MarineRadar shows the latest AIS broadcast from USNS SGT.WILLIAM R.BUTTON 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 cargo, USNS SGT.WILLIAM R.BUTTON sits in the same design class as the other cargos listed in the Similar Vessels section of the vessel page, or in the full cargo directory at /vessel-type/cargo. USNS SGT.WILLIAM R.BUTTON has a gross tonnage of 44,543 GT.