NAVANTIA SAN FERNANDO 523 — Military Ops · IMO 4512568

NAVANTIA SAN FERNANDO 523 has not broadcast an AIS position for 11 days. The most recent broadcast placed it in the Tasman Sea, on 28 Oct 2026, 21:20 UTC. It was sailing from SYDNEY to SYDNEY. Vessels stop appearing on terrestrial AIS when they move beyond receiver range, so a gap does not necessarily mean the vessel is inactive.

NAVANTIA SAN FERNANDO 523 broadcasts MMSI 503770200 and is registered as IMO 4512568, with call sign VKSW. 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.

NAVANTIA SAN FERNANDO 523 is classified as a military ops vessel registered under the AU flag. The vessel-type classification is derived from the AIS Type field broadcast by the ship's transponder; full military ops fleet at /vessel-type/military-special and full AU flag list at /flag/au.

MarineRadar shows the latest AIS broadcast from NAVANTIA SAN FERNANDO 523 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 military ops, NAVANTIA SAN FERNANDO 523 sits in the same design class as the other military opss listed in the Similar Vessels section of the vessel page, or in the full military ops directory at /vessel-type/military-special.