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
SJ 183
U.S. Official No. 655234
Not yet on Master's MateType
UNSPECIFIED
Flag
USALength
79.2 m
Beam
16 m
Draft
3.7 m
First reported
Jun 2026
AIS reports
1
SJ 183 is an American 79.2-metre boat. She has a beam measuring 16 metres and a draft measuring 3.7 metres. Find her under U.S. official number 655234. Sign SJ 183 up free to the Master's Mate Safety Initiative Network and join a fleet that looks after its own.
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Is SJ 183 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 SJ 183 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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Joining the Safety Initiative Network doesn't just put SJ 183 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 SJ 183 and switch it all on
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About SJ 183
What kind of vessel is SJ 183?
SJ 183 is a UNSPECIFIED flagged to United States of America.
What is SJ 183's U.S. Official No.?
SJ 183's U.S. Official No. is 655234.
How big is SJ 183?
SJ 183 is about 79.2 m long, 16 m on the beam, drawing 3.7 m.
Is SJ 183 on the Master's Mate Safety Initiative Network?
Not yet. If SJ 183 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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