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

Tansei Maru

MMSI 431083000

Not yet on Master's Mate

Flag

JPN

Length

51 m

IMO

8130265

AIS reports

Tansei Maru, a craft listed on the Japan registry, measures 51 metres on deck. On AIS she appears as MMSI 431083000, IMO 8130265. Tansei Maru is welcome on the Master's Mate Safety Initiative Network — a free, community-run watch where boats look out for one another.

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Is Tansei 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 Tansei 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 Tansei 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 Tansei Maru and switch it all on

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About Tansei Maru

What kind of vessel is Tansei Maru?

Tansei Maru is a vessel flagged to Japan.

What is Tansei Maru's MMSI?

Tansei Maru's MMSI is 431083000. IMO 8130265.

How big is Tansei Maru?

Tansei Maru is about 51 m long.

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

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