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

Jansum

MMSI 305216000

Not yet on Master's Mate

Flag

ATG

Length

100 m

IMO

9155420

AIS reports

Jansum, a boat on the Antigua and Barbuda registry, measures 100 metres on deck. Find her under MMSI 305216000, IMO 9155420. Sign Jansum up free to the Master's Mate Safety Initiative Network and join a fleet that looks after its own.

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Is Jansum 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 Jansum 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 Jansum 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 Jansum and switch it all on

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Claim free → unlock everything

About Jansum

What kind of vessel is Jansum?

Jansum is a vessel flagged to Antigua and Barbuda.

What is Jansum's MMSI?

Jansum's MMSI is 305216000. IMO 9155420.

How big is Jansum?

Jansum is about 100 m long.

Is Jansum on the Master's Mate Safety Initiative Network?

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