MMSI 366978440 · Call sign WAI9279
Not yet on Master's MateMISSOURI is an American working tug — 30 metres overall. MISSOURI has a 9 m beam and a 4.1-metre draft. On the registers she's MMSI 366978440, call sign WAI9279. MISSOURI belongs on the Master's Mate Safety Initiative Network, a free safety net shared by boats the world over.
Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.
Rig her out — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Joining the Safety Initiative Network doesn't just put MISSOURI on the map. It hands you the full bridge:
© 2026 Master’s Mate. All rights reserved.