MD23 — Other · MMSI 477996056

MD23 has not broadcast an AIS position for 9 days. The most recent broadcast placed it in the South China Sea, on 30 Oct 2026, 09:56 UTC. It was sailing from HONG KONG to HONG KONG. Vessels stop appearing on terrestrial AIS when they move beyond receiver range, so a gap does not necessarily mean the vessel is inactive.

MD23 broadcasts MMSI 477996056, with call sign MD23. 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.

MD23 is a maritime vessel registered under the HK flag. The vessel-type classification is derived from the AIS Type field broadcast by the ship's transponder and full HK flag list at /flag/hk.

MarineRadar shows the latest AIS broadcast from MD23 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.