MMSI 368316520 · Call sign WDN8328
Not yet on Master's MateProblem Solver, an American working fishing boat, measures 10 metres on deck. She's built with a 2.9 m beam and a 1.5 m draft. On AIS she appears as MMSI 368316520, call sign WDN8328. Give Problem Solver the backing of the Master's Mate Safety Initiative Network — free, and a fleet that has her back.
Live AIS traffic, weather you can plan around, engine & systems telemetry, and a distress mesh that reaches nearby boats.
Keep the fleet in sight — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Joining the Safety Initiative Network doesn't just put Problem Solver on the map. It hands you the full bridge:
© 2026 Master’s Mate. All rights reserved.