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.
Passenger (Uninspected)
Dem Boys
MMSI 367780280 · Call sign WDJ4702
Not yet on Master's MateType
Passenger (Uninspected)
Flag
USALength
18.9 m
Beam
5 m
Draft
2.7 m
Call sign
WDJ4702
Official No.
1274717
AIS reports
1
Dem Boys is an American passenger craft, spanning 18.9 metres. Below, she has a 5 m beam and a draft measuring 2.7 metres. On the registers she's MMSI 367780280, call sign WDJ4702. Dem Boys is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard Dem Boys safe.
Distress alerting, live AIS, onboard monitoring and weather routing — the safety stack for boats that carry people.
Switch on the safety stack — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever Dem Boys 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 passenger & charter operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Dem Boys on the map. It hands you the full bridge:
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.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
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 Dem Boys and switch it all on
Free to join · nothing to install to start · cancel anytime
About Dem Boys
What kind of vessel is Dem Boys?
Dem Boys is a Passenger (Uninspected) flagged to United States of America.
What is Dem Boys's MMSI?
Dem Boys's MMSI is 367780280. Call sign WDJ4702.
How big is Dem Boys?
Dem Boys is about 18.9 m long, 5 m on the beam, drawing 2.7 m.
Is Dem Boys on the Master's Mate Safety Initiative Network?
Not yet. If Dem Boys is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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