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

Kosei Maru

MMSI 431401525

Not yet on Master's Mate

Flag

JPN

Length

76 m

IMO

9046851

AIS reports

Kosei Maru flies the Japanese flag — a 76-metre boat. Find her under MMSI 431401525, IMO 9046851. Kosei Maru belongs on the Master's Mate Safety Initiative Network, a free safety net shared by boats the world over.

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Is Kosei 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 Kosei 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 Kosei 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 Kosei Maru and switch it all on

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About Kosei Maru

What kind of vessel is Kosei Maru?

Kosei Maru is a vessel flagged to Japan.

What is Kosei Maru's MMSI?

Kosei Maru's MMSI is 431401525. IMO 9046851.

How big is Kosei Maru?

Kosei Maru is about 76 m long.

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

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