CHICHIJIMA — Military Ops · MMSI 431999595

CHICHIJIMA has not broadcast an AIS position for 8 days. The most recent broadcast placed it in the Sea of Japan, on 29 Oct 2026, 04:14 UTC. It was sailing from YOKOSUKA to YOKOSUKA. Vessels stop appearing on terrestrial AIS when they move beyond receiver range, so a gap does not necessarily mean the vessel is inactive.

CHICHIJIMA broadcasts MMSI 431999595, with call sign JSSU. 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.

CHICHIJIMA is classified as a military ops vessel registered under the JP 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 JP flag list at /flag/jp.

MarineRadar shows the latest AIS broadcast from CHICHIJIMA 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, CHICHIJIMA 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.