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.
Law Enforcement
MU04
MMSI 316023267 · Call sign MU04
Not yet on Master's MateType
Law Enforcement
Flag
CANLength
9 m
Beam
3 m
Call sign
MU04
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
9
Registered in Canada, MU04 is a 9-metre boat. MU04 has a beam of 3 m. On AIS she appears as MMSI 316023267, call sign MU04. MU04 is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
Free forever · No credit card
Is MU04 your boat?
Your free claim unlocks the most powerful cruising platform ever built — anchor watch, worldwide charts, live AIS, weather routing, and a network of cruisers watching each other’s backs.
Claim this boat — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Live AIS position · Jun 9, 2026 10:59 UTC
Position
43.6376° N, 79.3858° W
Speed
0.1 kn
Course
360°
Crossing Lake Ontario? You're never out there alone.
Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.
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The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put MU04 on the map. It hands you the full bridge:
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.
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.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim MU04 and switch it all on
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About MU04
What kind of vessel is MU04?
MU04 is a Law Enforcement flagged to Canada.
Where was MU04 last seen?
MU04 was last reported in Lake Ontario in Jun 2026 on public AIS.
What is MU04's MMSI?
MU04's MMSI is 316023267. Call sign MU04.
How big is MU04?
MU04 is about 9 m long, 3 m on the beam.
Is MU04 on the Master's Mate Safety Initiative Network?
Not yet. If MU04 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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