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.
Cargo
TETSURYU MARU
MMSI 431001305 · Call sign JD3052
Not yet on Master's MateType
Cargo
Flag
JPNLength
83 m
Beam
13 m
Draft
5 m
Call sign
JD3052
IMO
9572537
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
30
TETSURYU MARU, a merchant ship under the Japanese flag, measures 83 metres on deck. She has 13 metres in the beam and a draft measuring 5 metres. On the registers she's MMSI 431001305, call sign JD3052, IMO 9572537. The Master's Mate Safety Initiative Network welcomes TETSURYU MARU — free to join, cruiser-run, and always on watch.
Free forever · No credit card · for commercial operators
Eyes on TETSURYU MARU, around the clock.
Real-time AIS, full systems telemetry, distress alerting and worldwide charts — your hull on one dashboard, from anywhere.
Put her on the dashboard — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Last known position · Jun 2, 2026
Position
35.9272° N, 140.6619° E
Transiting the Sea of Japan? 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 TETSURYU MARU on the map. It hands you the full bridge:
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
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.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Anchor Watch
GPS-precise drag alarms that actually wake you — and your whole crew. Sleep through the night.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim TETSURYU MARU and switch it all on
Free to join · nothing to install to start · cancel anytime
About TETSURYU MARU
What kind of vessel is TETSURYU MARU?
TETSURYU MARU is a Cargo flagged to Japan.
Where was TETSURYU MARU last seen?
TETSURYU MARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is TETSURYU MARU's MMSI?
TETSURYU MARU's MMSI is 431001305. Call sign JD3052. IMO 9572537.
How big is TETSURYU MARU?
TETSURYU MARU is about 83 m long, 13 m on the beam, drawing 5 m.
Is TETSURYU MARU on the Master's Mate Safety Initiative Network?
Not yet. If TETSURYU MARU is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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