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
Denny Boy
MMSI 367450070 · Call sign WDF4287
Not yet on Master's MateFlag
USACall sign
WDF4287
Official No.
248552
AIS reports
1
Denny Boy flies the American flag — a craft. Look for MMSI 367450070, call sign WDF4287. Sign Denny Boy up free to the Master's Mate Safety Initiative Network and join a fleet that looks after its own.
Free forever · No credit card
Is Denny Boy 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 Denny Boy 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 Denny Boy 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 Denny Boy and switch it all on
Free to join · nothing to install to start · cancel anytime
About Denny Boy
What kind of vessel is Denny Boy?
Denny Boy is a vessel flagged to United States of America.
What is Denny Boy's MMSI?
Denny Boy's MMSI is 367450070. Call sign WDF4287.
Is Denny Boy on the Master's Mate Safety Initiative Network?
Not yet. If Denny Boy is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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