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.
Sailing
HARMATTAN
MMSI 232017954 · Call sign MDVE4
Not yet on Master's MateType
Sailing
Flag
GBRLength
11 m
Beam
4 m
Call sign
MDVE4
First reported
Apr 2026
Last reported
Apr 2026
AIS reports
85
HARMATTAN is a British bluewater sailboat, spanning 11 metres. Below, she has a beam of 4 m. Officially she's MMSI 232017954, call sign MDVE4. Sleep easier at anchor — HARMATTAN can join the free Master's Mate Safety Initiative Network, with drag alarms and cruisers nearby.
Free forever · No credit card · for cruisers
Sleep easy on the hook aboard HARMATTAN.
GPS-precise anchor-drag alarms, ETA-calibrated weather routing, worldwide charts, and cruisers watching each other’s backs.
Set her anchor watch — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Last known position · Apr 4, 2026
Position
18.0326° N, 63.0984° W
Sailing 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.
Free with your claim · for cruisers
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put HARMATTAN 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.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
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.
Claim HARMATTAN and switch it all on
Free to join · nothing to install to start · cancel anytime
About HARMATTAN
What kind of vessel is HARMATTAN?
HARMATTAN is a Sailing flagged to United Kingdom.
Where was HARMATTAN last seen?
HARMATTAN was last reported in the Caribbean in Apr 2026 on public AIS.
What is HARMATTAN's MMSI?
HARMATTAN's MMSI is 232017954. Call sign MDVE4.
How big is HARMATTAN?
HARMATTAN is about 11 m long, 4 m on the beam.
Is HARMATTAN on the Master's Mate Safety Initiative Network?
Not yet. If HARMATTAN is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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