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.
Tanker
SEA DUCK
MMSI 636024429 · Call sign 5LSN9
Not yet on Master's MateType
Tanker
Flag
LBRLength
120 m
Beam
20 m
Draft
4.7 m
Call sign
5LSN9
IMO
9443839
First reported
May 2026
Last reported
May 2026
AIS reports
85
Registered in Liberia, SEA DUCK is a 120-metre tank vessel. She has a 20-metre beam and a draft measuring 4.7 metres. On AIS she shows as MMSI 636024429, call sign 5LSN9, IMO 9443839. Put SEA DUCK on the Master's Mate Safety Initiative Network — free to claim, with a whole fleet watching out for her.
Free forever · No credit card · for commercial operators
Eyes on SEA DUCK, 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
Last known position · May 27, 2026
Position
14.4383° N, 61.1257° W
Transiting the Caribbean? 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 SEA DUCK 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 SEA DUCK and switch it all on
Free to join · nothing to install to start · cancel anytime
About SEA DUCK
What kind of vessel is SEA DUCK?
SEA DUCK is a Tanker flagged to Liberia.
Where was SEA DUCK last seen?
SEA DUCK was last reported in the Caribbean in May 2026 on public AIS.
What is SEA DUCK's MMSI?
SEA DUCK's MMSI is 636024429. Call sign 5LSN9. IMO 9443839.
How big is SEA DUCK?
SEA DUCK is about 120 m long, 20 m on the beam, drawing 4.7 m.
Is SEA DUCK on the Master's Mate Safety Initiative Network?
Not yet. If SEA DUCK is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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