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
MU21
MMSI 316023273 · Call sign MU21
Not yet on Master's MateType
Law Enforcement
Flag
CANLength
8 m
Beam
4 m
Call sign
MU21
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
59
MU21, a Canadian craft, measures 8 metres on deck. Her hull carries a beam of 4 m. She's listed under MMSI 316023273, call sign MU21. Bring MU21 aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.
Free forever · No credit card
Is MU21 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 11:11 UTC
Position
43.6379° N, 79.3854° W
Speed
0.3 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.
Free with your claim
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put MU21 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 MU21 and switch it all on
Free to join · nothing to install to start · cancel anytime
About MU21
What kind of vessel is MU21?
MU21 is a Law Enforcement flagged to Canada.
Where was MU21 last seen?
MU21 was last reported in Lake Ontario in Jun 2026 on public AIS.
What is MU21's MMSI?
MU21's MMSI is 316023273. Call sign MU21.
How big is MU21?
MU21 is about 8 m long, 4 m on the beam.
Is MU21 on the Master's Mate Safety Initiative Network?
Not yet. If MU21 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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