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.
Tug
DEMON
MMSI 368100840 · Call sign WDK9142
Not yet on Master's MateType
Tug
Flag
USALength
10 m
Beam
5 m
Draft
2 m
Call sign
WDK9142
Official No.
1239126
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
29
DEMON is an American 10-metre tugboat. She's built with 5 metres in the beam and a 2 m draft. Find her under MMSI 368100840, call sign WDK9142. DEMON is welcome on the Master's Mate Safety Initiative Network — a free, community-run watch where boats look out for one another.
Free forever · No credit card · for working boats
Built for boats that work — like DEMON.
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 3, 2026
Position
45.6083° N, 122.6862° W
Wherever DEMON 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 DEMON 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 DEMON and switch it all on
Free to join · nothing to install to start · cancel anytime
About DEMON
What kind of vessel is DEMON?
DEMON is a Tug flagged to United States of America.
Where was DEMON last seen?
DEMON was last reported in around 46°N 123°W in Jun 2026 on public AIS.
What is DEMON's MMSI?
DEMON's MMSI is 368100840. Call sign WDK9142.
How big is DEMON?
DEMON is about 10 m long, 5 m on the beam, drawing 2 m.
Is DEMON on the Master's Mate Safety Initiative Network?
Not yet. If DEMON is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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