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.
UNSPECIFIED
THE OFFSHORE CO NO 21
U.S. Official No. 251204
Not yet on Master's MateType
UNSPECIFIED
Flag
USALength
79 m
Beam
14.7 m
Draft
3.7 m
First reported
Jun 2026
AIS reports
1
Out of the United States, THE OFFSHORE CO NO 21 is a 79-metre craft. She's built with a 14.7 m beam and a 3.7-metre draft. She's listed under U.S. official number 251204. Bring THE OFFSHORE CO NO 21 aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.
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Is THE OFFSHORE CO NO 21 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 THE OFFSHORE CO NO 21 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 THE OFFSHORE CO NO 21 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 THE OFFSHORE CO NO 21 and switch it all on
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About THE OFFSHORE CO NO 21
What kind of vessel is THE OFFSHORE CO NO 21?
THE OFFSHORE CO NO 21 is a UNSPECIFIED flagged to United States of America.
What is THE OFFSHORE CO NO 21's U.S. Official No.?
THE OFFSHORE CO NO 21's U.S. Official No. is 251204.
How big is THE OFFSHORE CO NO 21?
THE OFFSHORE CO NO 21 is about 79 m long, 14.7 m on the beam, drawing 3.7 m.
Is THE OFFSHORE CO NO 21 on the Master's Mate Safety Initiative Network?
Not yet. If THE OFFSHORE CO NO 21 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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