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

Tenyo Maru

MMSI 431100216

Not yet on Master's Mate

Flag

JPN

Length

114 m

IMO

9142370

AIS reports

Out of Japan, Tenyo Maru is an 114-metre vessel. Officially she's MMSI 431100216, IMO 9142370. Tenyo Maru is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.

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Is Tenyo 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 Tenyo 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 Tenyo 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 Tenyo Maru and switch it all on

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About Tenyo Maru

What kind of vessel is Tenyo Maru?

Tenyo Maru is a vessel flagged to Japan.

What is Tenyo Maru's MMSI?

Tenyo Maru's MMSI is 431100216. IMO 9142370.

How big is Tenyo Maru?

Tenyo Maru is about 114 m long.

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

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