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

Rei Maru

MMSI 431001046

Not yet on Master's Mate

Flag

JPN

Length

104.9 m

IMO

9498066

AIS reports

Rei Maru, a Japanese craft, measures 104.9 metres on deck. Her papers read MMSI 431001046, IMO 9498066. Put Rei Maru on the Master's Mate Safety Initiative Network — free to claim, with a whole fleet watching out for her.

Free forever · No credit card

Is Rei 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.

Claim this boat — free →

Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers

Wherever Rei 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 Rei 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 Rei Maru and switch it all on

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Claim free → unlock everything

About Rei Maru

What kind of vessel is Rei Maru?

Rei Maru is a vessel flagged to Japan.

What is Rei Maru's MMSI?

Rei Maru's MMSI is 431001046. IMO 9498066.

How big is Rei Maru?

Rei Maru is about 104.9 m long.

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

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