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.
Towing Vessel
HANDY FOUR
MMSI 367752440 · Call sign WDJ8531
Not yet on Master's MateType
Towing Vessel
Flag
USALength
25 m
Beam
10 m
Draft
4.6 m
Call sign
WDJ8531
Official No.
1272237
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
81
Registered in the United States, HANDY FOUR is a 25-metre working vessel. Below, she has a beam measuring 10 metres and a draft measuring 4.6 metres. On AIS she shows as MMSI 367752440, call sign WDJ8531. HANDY FOUR earns her keep on the water; the free Master's Mate Safety Initiative Network keeps a watching fleet and a distress mesh close at hand.
Free forever · No credit card · for working boats
Built for boats that work — like HANDY FOUR.
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
Last known position · Jun 4, 2026
Position
43.0793° N, 70.7571° W
Working the Gulf of Maine? 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 HANDY FOUR 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 HANDY FOUR and switch it all on
Free to join · nothing to install to start · cancel anytime
About HANDY FOUR
What kind of vessel is HANDY FOUR?
HANDY FOUR is a Towing Vessel flagged to United States of America.
Where was HANDY FOUR last seen?
HANDY FOUR was last reported in the Gulf of Maine in Jun 2026 on public AIS.
What is HANDY FOUR's MMSI?
HANDY FOUR's MMSI is 367752440. Call sign WDJ8531.
How big is HANDY FOUR?
HANDY FOUR is about 25 m long, 10 m on the beam, drawing 4.6 m.
Is HANDY FOUR on the Master's Mate Safety Initiative Network?
Not yet. If HANDY FOUR is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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