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.
Industrial Vessel
SEI 56
U.S. Official No. 1211843
Not yet on Master's MateType
Industrial Vessel
Flag
USALength
43.3 m
Beam
26.5 m
Draft
4 m
First reported
Jun 2026
AIS reports
1
SEI 56 flies the American flag — a 43.3-metre cargo vessel. Her hull carries a 26.5-metre beam and a draft measuring 4 metres. On the registers she's U.S. official number 1211843. Big or small, every hull benefits from the free Master's Mate Safety Initiative Network — SEI 56 included.
Free forever · No credit card · for commercial operators
Eyes on SEI 56, around the clock.
Real-time AIS, full systems telemetry, distress alerting and worldwide charts — your hull on one dashboard, from anywhere.
Put her on the dashboard — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever SEI 56 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 · for commercial operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put SEI 56 on the map. It hands you the full bridge:
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
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.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Anchor Watch
GPS-precise drag alarms that actually wake you — and your whole crew. Sleep through the night.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim SEI 56 and switch it all on
Free to join · nothing to install to start · cancel anytime
About SEI 56
What kind of vessel is SEI 56?
SEI 56 is a Industrial Vessel flagged to United States of America.
What is SEI 56's U.S. Official No.?
SEI 56's U.S. Official No. is 1211843.
How big is SEI 56?
SEI 56 is about 43.3 m long, 26.5 m on the beam, drawing 4 m.
Is SEI 56 on the Master's Mate Safety Initiative Network?
Not yet. If SEI 56 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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