Master's MateSafety Initiative Network
The Master's Mate Safety Initiative Network (MMSIn) — like AAA for the ocean, but free & community-driven. Cruisers keeping each other safe: anchor-drag & distress alerts, a verified captains directory, and a watch network that has your back.
Vessel
TETRAS
Poland · last seen 54°N 19°E · Jun 2026 · MMSI 261000542
Not yet on Master's MateFlag
POLFirst reported
Jun 2026
Last reported
Jun 2026
AIS reports
94
TETRAS is a Polish vessel. Her registration reads MMSI 261000542. TETRAS can join the Master's Mate Safety Initiative Network for free: think of it as a watch network that has every boat's back.
Free forever · No credit card
Is TETRAS your boat?
Your free claim unlocks the most powerful cruising platform ever built — anchor watch, worldwide charts, live AIS, weather routing, and a network of cruisers watching each other’s backs.
Claim this boat — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Live AIS position · Jun 15, 2026 17:54 UTC
Position
54.3620° N, 18.6592° E
Status
Under way (engine)
Speed
0.0 kn
Course
209°
Crossing the Baltic Sea? You're never out there alone.
Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.
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The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put TETRAS on the map. It hands you the full bridge:
Anchor Watch
GPS-precise drag alarms that actually wake you — and your whole crew. Sleep through the night.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim TETRAS and switch it all on
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About TETRAS
What kind of vessel is TETRAS?
TETRAS is a vessel flagged to Poland.
Where was TETRAS last seen?
TETRAS was last reported in the Baltic Sea in Jun 2026 on public AIS.
What is TETRAS's MMSI?
TETRAS's MMSI is 261000542.
Is TETRAS on the Master's Mate Safety Initiative Network?
Not yet. If TETRAS is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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