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

Yangtze Happiness

MMSI 477211700

Not yet on Master's Mate

Flag

HKG

Length

179 m

IMO

9584243

AIS reports

Yangtze Happiness flies the Hong Kong flag — a 179-metre boat. Her papers read MMSI 477211700, IMO 9584243. Join Yangtze Happiness to the Master's Mate Safety Initiative Network — free, and built by cruisers for cruisers.

Free forever · No credit card

Is Yangtze Happiness 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 Yangtze Happiness 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 Yangtze Happiness 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 Yangtze Happiness and switch it all on

Free to join · nothing to install to start · cancel anytime

Claim free → unlock everything

About Yangtze Happiness

What kind of vessel is Yangtze Happiness?

Yangtze Happiness is a vessel flagged to Hong Kong S.A.R..

What is Yangtze Happiness's MMSI?

Yangtze Happiness's MMSI is 477211700. IMO 9584243.

How big is Yangtze Happiness?

Yangtze Happiness is about 179 m long.

Is Yangtze Happiness on the Master's Mate Safety Initiative Network?

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