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.
Offshore Supply Vessel
Explorer
MMSI 367544000 · Call sign WDL4164
Not yet on Master's MateType
Offshore Supply Vessel
Flag
USALength
54.3 m
Beam
12.3 m
Draft
4.3 m
Call sign
WDL4164
IMO
7807689
Official No.
611524
AIS reports
2
On the American registry, Explorer is a 54.3-metre work boat. Below, she has 12.3 metres in the beam and a draft measuring 4.3 metres. Her papers read MMSI 367544000, call sign WDL4164, IMO 7807689. Explorer can be part of the Master's Mate Safety Initiative Network at no cost — a community watch that never sleeps.
Free forever · No credit card · for working boats
Built for boats that work — like Explorer.
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
Wherever Explorer roams, 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 working boats
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Explorer 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 Explorer and switch it all on
Free to join · nothing to install to start · cancel anytime
About Explorer
What kind of vessel is Explorer?
Explorer is a Offshore Supply Vessel flagged to United States of America.
What is Explorer's MMSI?
Explorer's MMSI is 367544000. Call sign WDL4164. IMO 7807689.
How big is Explorer?
Explorer is about 54.3 m long, 12.3 m on the beam, drawing 4.3 m.
Is Explorer on the Master's Mate Safety Initiative Network?
Not yet. If Explorer is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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