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

Jo Lonn

MMSI 257530000

Not yet on Master's Mate

Flag

NOR

Length

175 m

IMO

8000903

AIS reports

Jo Lonn is a boat on the Norway registry, 175 metres on deck. Officially she's MMSI 257530000, IMO 8000903. Jo Lonn is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.

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Is Jo Lonn 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 Jo Lonn 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 Jo Lonn 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 Jo Lonn and switch it all on

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About Jo Lonn

What kind of vessel is Jo Lonn?

Jo Lonn is a vessel flagged to Norway.

What is Jo Lonn's MMSI?

Jo Lonn's MMSI is 257530000. IMO 8000903.

How big is Jo Lonn?

Jo Lonn is about 175 m long.

Is Jo Lonn on the Master's Mate Safety Initiative Network?

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