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

Longstone

MMSI 247392200

Not yet on Master's Mate

Flag

ITA

Length

209.7 m

IMO

9848479

AIS reports

Registered in Italy, Longstone is a 209.7-metre vessel. She's on record as MMSI 247392200, IMO 9848479. Longstone belongs on the Master's Mate Safety Initiative Network, a free safety net shared by boats the world over.

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Is Longstone 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 Longstone 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 Longstone 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 Longstone and switch it all on

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About Longstone

What kind of vessel is Longstone?

Longstone is a vessel flagged to Italy.

What is Longstone's MMSI?

Longstone's MMSI is 247392200. IMO 9848479.

How big is Longstone?

Longstone is about 209.7 m long.

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

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