MMSI 276659000 · Call sign ES2665
Not yet on Master's MateTENACIOUS, an Estonian fishing craft, measures 22 metres on deck. Below, she has a beam of 7 m. She broadcasts as MMSI 276659000, call sign ES2665, IMO 8820872. TENACIOUS is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
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 TENACIOUS on the map. It hands you the full bridge:
© 2026 Master’s Mate. All rights reserved.