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.
Towing Vessel
Leo
MMSI 367148960 · Call sign WDD4782
Not yet on Master's MateType
Towing Vessel
Flag
USALength
22.4 m
Beam
10.4 m
Draft
3.8 m
Call sign
WDD4782
IMO
9369215
Official No.
1193138
AIS reports
1
Leo is an American work boat — 22.4 metres overall. She has a beam of 10.4 m and a draft measuring 3.8 metres. On AIS she shows as MMSI 367148960, call sign WDD4782, IMO 9369215. Working vessels like Leo are never truly alone on the Master's Mate Safety Initiative Network — free, with a fleet on watch.
Free forever · No credit card · for working boats
Built for boats that work — like Leo.
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
Wherever Leo 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 Leo 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 Leo and switch it all on
Free to join · nothing to install to start · cancel anytime
About Leo
What kind of vessel is Leo?
Leo is a Towing Vessel flagged to United States of America.
What is Leo's MMSI?
Leo's MMSI is 367148960. Call sign WDD4782. IMO 9369215.
How big is Leo?
Leo is about 22.4 m long, 10.4 m on the beam, drawing 3.8 m.
Is Leo on the Master's Mate Safety Initiative Network?
Not yet. If Leo is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
© 2026 Master’s Mate. All rights reserved.