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
KOKUSAIMARU NO.1
Japan · last seen 34°N 134°E · Jun 2026 · MMSI 431000223
Not yet on Master's MateFlag
JPNLength
70 m
IMO
8731734
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
7
KOKUSAIMARU NO.1, a Japanese boat, measures 70 metres on deck. Her registration reads MMSI 431000223, IMO 8731734. KOKUSAIMARU NO.1 can join the Master's Mate Safety Initiative Network for free: think of it as a watch network that has every boat's back.
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Is KOKUSAIMARU NO.1 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 15, 2026
Position
34.3555° N, 134.0509° 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 KOKUSAIMARU NO.1 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 KOKUSAIMARU NO.1 and switch it all on
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About KOKUSAIMARU NO.1
What kind of vessel is KOKUSAIMARU NO.1?
KOKUSAIMARU NO.1 is a vessel flagged to Japan.
Where was KOKUSAIMARU NO.1 last seen?
KOKUSAIMARU NO.1 was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is KOKUSAIMARU NO.1's MMSI?
KOKUSAIMARU NO.1's MMSI is 431000223. IMO 8731734.
How big is KOKUSAIMARU NO.1?
KOKUSAIMARU NO.1 is about 70 m long.
Is KOKUSAIMARU NO.1 on the Master's Mate Safety Initiative Network?
Not yet. If KOKUSAIMARU NO.1 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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