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
B4
last seen 39°N 1°E · Jun 2026 · MMSI 224112180
Not yet on Master's MateLength
40 m
Beam
7 m
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
4
B4 is a craft, spanning 40 metres. Her hull carries 7 metres in the beam. She's listed under MMSI 224112180. Join B4 to the Master's Mate Safety Initiative Network — free, and built by cruisers for cruisers.
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Is B4 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
Live AIS position · Jun 16, 2026 07:52 UTC
Position
38.9770° N, 1.3029° E
Status
At anchor
Speed
0.0 kn
Course
0°
Crossing the Western Mediterranean? 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 B4 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 B4 and switch it all on
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About B4
What kind of vessel is B4?
B4 is a vessel.
Where was B4 last seen?
B4 was last reported in the Western Mediterranean in Jun 2026 on public AIS.
What is B4's MMSI?
B4's MMSI is 224112180.
How big is B4?
B4 is about 40 m long, 7 m on the beam.
Is B4 on the Master's Mate Safety Initiative Network?
Not yet. If B4 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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