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.
Dredging
HORIZON PROSPECTOR
MMSI 232064538 · Call sign 3E5407
Not yet on Master's MateType
Dredging
Flag
GBRLength
85 m
Beam
21 m
Draft
4.8 m
Call sign
3E5407
IMO
9770189
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
85
HORIZON PROSPECTOR flies the British flag — an 85-metre utility vessel. She's built with a 21-metre beam and a 4.8-metre draft. She broadcasts as MMSI 232064538, call sign 3E5407, IMO 9770189. Give HORIZON PROSPECTOR the backing of the Master's Mate Safety Initiative Network — free, and a fleet that has her back.
Free forever · No credit card · for working boats
Built for boats that work — like HORIZON PROSPECTOR.
Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.
Rig her out — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Live AIS position · Jun 9, 2026 22:28 UTC
Position
55.9821° N, 3.1731° W
Status
Moored
Speed
0.0 kn
Course
140°
Destination
LEITH
ETA
09-30 19:00 UTC
Working 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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Joining the Safety Initiative Network doesn't just put HORIZON PROSPECTOR on the map. It hands you the full bridge:
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
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.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
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.
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 HORIZON PROSPECTOR and switch it all on
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About HORIZON PROSPECTOR
What kind of vessel is HORIZON PROSPECTOR?
HORIZON PROSPECTOR is a Dredging flagged to United Kingdom.
Where was HORIZON PROSPECTOR last seen?
HORIZON PROSPECTOR was last reported in the North Sea in Jun 2026 on public AIS.
What is HORIZON PROSPECTOR's MMSI?
HORIZON PROSPECTOR's MMSI is 232064538. Call sign 3E5407. IMO 9770189.
How big is HORIZON PROSPECTOR?
HORIZON PROSPECTOR is about 85 m long, 21 m on the beam, drawing 4.8 m.
Is HORIZON PROSPECTOR on the Master's Mate Safety Initiative Network?
Not yet. If HORIZON PROSPECTOR is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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