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.
Unclassified
S.E.A. ISLAND III
U.S. Official No. 991973
Not yet on Master's MateType
Unclassified
Flag
USALength
12.2 m
Beam
4.9 m
Draft
0.9 m
First reported
Jun 2026
AIS reports
1
On the American registry, S.E.A. ISLAND III is a 12.2-metre vessel. She's built with a 4.9-metre beam and a 0.9-metre draft. She's listed under U.S. official number 991973. Put S.E.A. ISLAND III on the Master's Mate Safety Initiative Network — free to claim, with a whole fleet watching out for her.
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Is S.E.A. ISLAND III 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 S.E.A. ISLAND III 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 S.E.A. ISLAND III 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 S.E.A. ISLAND III and switch it all on
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About S.E.A. ISLAND III
What kind of vessel is S.E.A. ISLAND III?
S.E.A. ISLAND III is a Unclassified flagged to United States of America.
What is S.E.A. ISLAND III's U.S. Official No.?
S.E.A. ISLAND III's U.S. Official No. is 991973.
How big is S.E.A. ISLAND III?
S.E.A. ISLAND III is about 12.2 m long, 4.9 m on the beam, drawing 0.9 m.
Is S.E.A. ISLAND III on the Master's Mate Safety Initiative Network?
Not yet. If S.E.A. ISLAND III is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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