HARBOUR 4503 · MMSI 563073730

HARBOUR 4503 was last reported under way in the South China Sea, within the Strait of Malacca, on 8 Nov 2026, 05:26 UTC. It was sailing from TANAH MERAH to TANAH MERAH with an ETA of 6 Nov 2026, 01:39 UTC. Its exact coordinates, speed and ETA are shown at the top of this page and refresh from the latest AIS broadcast.

HARBOUR 4503 broadcasts MMSI 563073730. 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.

HARBOUR 4503 is a maritime vessel registered under the SG flag. The vessel-type classification is derived from the AIS Type field broadcast by the ship's transponder and full SG flag list at /flag/sg.

MarineRadar shows the latest AIS broadcast from HARBOUR 4503 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.

The vessel's design class is inferred from its dimensions, gross tonnage and dead weight, all of which are listed in the Identity and Specifications panels on the vessel page.