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 Tranquility

MMSI 553111367

Not yet on Master's Mate

Flag

PNG

Length

104 m

IMO

9117349

AIS reports

Ocean Tranquility is a craft listed on the Papua New Guinea registry, 104 metres from stem to stern. On AIS she shows as MMSI 553111367, IMO 9117349. The Master's Mate Safety Initiative Network welcomes Ocean Tranquility — free to join, cruiser-run, and always on watch.

Free forever · No credit card

Is Ocean Tranquility 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 Tranquility 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 Tranquility 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 Tranquility and switch it all on

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Claim free → unlock everything

About Ocean Tranquility

What kind of vessel is Ocean Tranquility?

Ocean Tranquility is a vessel flagged to Papua New Guinea.

What is Ocean Tranquility's MMSI?

Ocean Tranquility's MMSI is 553111367. IMO 9117349.

How big is Ocean Tranquility?

Ocean Tranquility is about 104 m long.

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

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