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 431002489

Not yet on Master's Mate

Flag

JPN

Length

95 m

IMO

9608104

AIS reports

Koryu Maru is a Japanese craft, spanning 95 metres. On AIS she appears as MMSI 431002489, IMO 9608104. Bring Koryu Maru aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.

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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.

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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

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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 431002489. IMO 9608104.

How big is Koryu Maru?

Koryu Maru is about 95 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).