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

Siobhan II

MMSI 367126420 · Call sign WDD3150

Not yet on Master's Mate

Flag

USA

Call sign

WDD3150

Official No.

667478

AIS reports

Siobhan II is an American boat. Her papers read MMSI 367126420, call sign WDD3150. Siobhan II belongs on the Master's Mate Safety Initiative Network, a free safety net shared by boats the world over.

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Is Siobhan II 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 Siobhan II 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 Siobhan II 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 Siobhan II and switch it all on

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About Siobhan II

What kind of vessel is Siobhan II?

Siobhan II is a vessel flagged to United States of America.

What is Siobhan II's MMSI?

Siobhan II's MMSI is 367126420. Call sign WDD3150.

Is Siobhan II on the Master's Mate Safety Initiative Network?

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