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.
Vessel
SLEIPNIR
MMSI 374887000 · Call sign 3FER4
Not yet on Master's MateFlag
PANLength
220 m
Beam
102 m
Draft
12 m
Call sign
3FER4
IMO
9781425
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
85
A Panamanian vessel, SLEIPNIR measures 220 metres. Below, she has a beam measuring 102 metres and a draft of 12 m. On the registers she's MMSI 374887000, call sign 3FER4, IMO 9781425. Give SLEIPNIR the backing of the Master's Mate Safety Initiative Network — free, and a fleet that has her back.
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Is SLEIPNIR 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
Last known position · Jun 4, 2026
Position
59.1089° N, 2.7125° E
Crossing the North Sea? 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 SLEIPNIR 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 SLEIPNIR and switch it all on
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About SLEIPNIR
What kind of vessel is SLEIPNIR?
SLEIPNIR is a vessel flagged to Panama.
Where was SLEIPNIR last seen?
SLEIPNIR was last reported in the North Sea in Jun 2026 on public AIS.
What is SLEIPNIR's MMSI?
SLEIPNIR's MMSI is 374887000. Call sign 3FER4. IMO 9781425.
How big is SLEIPNIR?
SLEIPNIR is about 220 m long, 102 m on the beam, drawing 12 m.
Is SLEIPNIR on the Master's Mate Safety Initiative Network?
Not yet. If SLEIPNIR is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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