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
MATSUYAMA MARU NO.12
MMSI 431005507
Not yet on Master's MateFlag
JPNLength
104.9 m
IMO
9711303
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
14
MATSUYAMA MARU NO.12, a vessel flying the Japanese flag, measures 104.9 metres on deck. She's on record as MMSI 431005507, IMO 9711303. Bring MATSUYAMA MARU NO.12 aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.
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Is MATSUYAMA MARU NO.12 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
Last known position · Jun 2, 2026
Position
35.5439° N, 139.9815° E
Crossing 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 MATSUYAMA MARU NO.12 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 MATSUYAMA MARU NO.12 and switch it all on
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About MATSUYAMA MARU NO.12
What kind of vessel is MATSUYAMA MARU NO.12?
MATSUYAMA MARU NO.12 is a vessel flagged to Japan.
Where was MATSUYAMA MARU NO.12 last seen?
MATSUYAMA MARU NO.12 was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is MATSUYAMA MARU NO.12's MMSI?
MATSUYAMA MARU NO.12's MMSI is 431005507. IMO 9711303.
How big is MATSUYAMA MARU NO.12?
MATSUYAMA MARU NO.12 is about 104.9 m long.
Is MATSUYAMA MARU NO.12 on the Master's Mate Safety Initiative Network?
Not yet. If MATSUYAMA MARU NO.12 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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