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
Z-THREE
MMSI 367396670 · Call sign WDM6874
Not yet on Master's MateType
Tug
Flag
USALength
27 m
Beam
10 m
Draft
4.6 m
Call sign
WDM6874
IMO
9194153
Official No.
1072784
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
87
Z-THREE, an American working tug, measures 27 metres on deck. She's built with a 10-metre beam and a 4.6-metre draft. Her papers read MMSI 367396670, call sign WDM6874, IMO 9194153. Give Z-THREE 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 Z-THREE.
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 04:42 UTC
Position
33.7637° N, 118.2569° W
Status
Under way (engine)
Speed
0.0 kn
Course
170°
Destination
US^0VF7>?? ???
Working off Southern California? 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 Z-THREE 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 Z-THREE and switch it all on
Free to join · nothing to install to start · cancel anytime
About Z-THREE
What kind of vessel is Z-THREE?
Z-THREE is a Tug flagged to United States of America.
Where was Z-THREE last seen?
Z-THREE was last reported in off Southern California in Jun 2026 on public AIS.
What is Z-THREE's MMSI?
Z-THREE's MMSI is 367396670. Call sign WDM6874. IMO 9194153.
How big is Z-THREE?
Z-THREE is about 27 m long, 10 m on the beam, drawing 4.6 m.
Is Z-THREE on the Master's Mate Safety Initiative Network?
Not yet. If Z-THREE is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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