SOUTHERN BLUE — Sailing Vessel · MMSI 503174840

SOUTHERN BLUE was last reported under way in the Indian Ocean, on 6 Nov 2026, 07:28 UTC. It was sailing from BANYUWANGI to BAUBAU with an ETA of 6 Nov 2026, 05:56 UTC. Its exact coordinates, speed and ETA are shown at the top of this page and refresh from the latest AIS broadcast.

SOUTHERN BLUE broadcasts MMSI 503174840. 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.

SOUTHERN BLUE is classified as a sailing vessel vessel registered under the AU flag. The vessel-type classification is derived from the AIS Type field broadcast by the ship's transponder; full sailing vessel fleet at /vessel-type/yacht and full AU flag list at /flag/au.

MarineRadar shows the latest AIS broadcast from SOUTHERN BLUE 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 sailing vessel, SOUTHERN BLUE sits in the same design class as the other sailing vessels listed in the Similar Vessels section of the vessel page, or in the full sailing vessel directory at /vessel-type/yacht.