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 FIVE
MMSI 367396790 · Call sign WDM6876
Not yet on Master's MateType
Tug
Flag
USALength
30 m
Beam
11 m
Call sign
WDM6876
Official No.
1072785
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
87
An American working tug, Z FIVE measures 30 metres. Z FIVE has 11 metres in the beam. Look for MMSI 367396790, call sign WDM6876. Add Z FIVE to the Master's Mate Safety Initiative Network — free to join, and the fleet keeps an eye out for each other.
Free forever · No credit card · for working boats
Built for boats that work — like Z FIVE.
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 03:49 UTC
Position
37.8219° N, 122.3114° W
Status
Under way (engine)
Speed
0.0 kn
Course
360°
Destination
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Working San Francisco Bay? 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 FIVE 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 FIVE and switch it all on
Free to join · nothing to install to start · cancel anytime
About Z FIVE
What kind of vessel is Z FIVE?
Z FIVE is a Tug flagged to United States of America.
Where was Z FIVE last seen?
Z FIVE was last reported in San Francisco Bay in Jun 2026 on public AIS.
What is Z FIVE's MMSI?
Z FIVE's MMSI is 367396790. Call sign WDM6876.
How big is Z FIVE?
Z FIVE is about 30 m long, 11 m on the beam.
Is Z FIVE on the Master's Mate Safety Initiative Network?
Not yet. If Z FIVE is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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