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

Rikuryu Maru

MMSI 431100363

Not yet on Master's Mate

Flag

JPN

Length

132 m

IMO

9177595

AIS reports

Out of Japan, Rikuryu Maru is a 132-metre craft. On AIS she appears as MMSI 431100363, IMO 9177595. Rikuryu Maru is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.

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Is Rikuryu 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 Rikuryu 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.

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The most powerful cruising platform ever built — yours, free.

Joining the Safety Initiative Network doesn't just put Rikuryu 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 Rikuryu Maru and switch it all on

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About Rikuryu Maru

What kind of vessel is Rikuryu Maru?

Rikuryu Maru is a vessel flagged to Japan.

What is Rikuryu Maru's MMSI?

Rikuryu Maru's MMSI is 431100363. IMO 9177595.

How big is Rikuryu Maru?

Rikuryu Maru is about 132 m long.

Is Rikuryu Maru on the Master's Mate Safety Initiative Network?

Not yet. If Rikuryu Maru is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).