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
Koryu Maru
MMSI 431005484
Not yet on Master's MateFlag
JPNLength
90 m
IMO
9697480
AIS reports
2
Koryu Maru is a Japanese 90-metre vessel. Her papers read MMSI 431005484, IMO 9697480. It's free to add Koryu Maru to the Master's Mate Safety Initiative Network — like AAA for the ocean, run by the cruisers who use it.
Free forever · No credit card
Is Koryu Maru 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
Wherever Koryu Maru roams, you're never out there alone.
Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.
Free with your claim
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Koryu Maru 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 Koryu Maru and switch it all on
Free to join · nothing to install to start · cancel anytime
About Koryu Maru
What kind of vessel is Koryu Maru?
Koryu Maru is a vessel flagged to Japan.
What is Koryu Maru's MMSI?
Koryu Maru's MMSI is 431005484. IMO 9697480.
How big is Koryu Maru?
Koryu Maru is about 90 m long.
Is Koryu Maru on the Master's Mate Safety Initiative Network?
Not yet. If Koryu Maru is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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