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

Ocean Rhea

MMSI 477986400

Not yet on Master's Mate

Flag

HKG

Length

230 m

IMO

9438729

AIS reports

Ocean Rhea, a Hong Kong craft, measures 230 metres on deck. She's listed under MMSI 477986400, IMO 9438729. Join Ocean Rhea to the Master's Mate Safety Initiative Network — free, and built by cruisers for cruisers.

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Is Ocean Rhea 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 Ocean Rhea 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 Ocean Rhea 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 Ocean Rhea and switch it all on

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About Ocean Rhea

What kind of vessel is Ocean Rhea?

Ocean Rhea is a vessel flagged to Hong Kong S.A.R..

What is Ocean Rhea's MMSI?

Ocean Rhea's MMSI is 477986400. IMO 9438729.

How big is Ocean Rhea?

Ocean Rhea is about 230 m long.

Is Ocean Rhea on the Master's Mate Safety Initiative Network?

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