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.
Offshore Supply Vessel
Lady B
MMSI 366850000 · Call sign WDN6152
Not yet on Master's MateType
Offshore Supply Vessel
Flag
USALength
55.8 m
Beam
12.2 m
Draft
4.6 m
Call sign
WDN6152
IMO
9202302
Official No.
1063001
AIS reports
4
An American working vessel, Lady B measures 55.8 metres. Her hull carries a beam of 12.2 m and a draft measuring 4.6 metres. On AIS she appears as MMSI 366850000, call sign WDN6152, IMO 9202302. Lady B belongs on the Master's Mate Safety Initiative Network, a free safety net shared by boats the world over.
Free forever · No credit card · for working boats
Built for boats that work — like Lady B.
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 Lady B 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 Lady B 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 Lady B and switch it all on
Free to join · nothing to install to start · cancel anytime
About Lady B
What kind of vessel is Lady B?
Lady B is a Offshore Supply Vessel flagged to United States of America.
What is Lady B's MMSI?
Lady B's MMSI is 366850000. Call sign WDN6152. IMO 9202302.
How big is Lady B?
Lady B is about 55.8 m long, 12.2 m on the beam, drawing 4.6 m.
Is Lady B on the Master's Mate Safety Initiative Network?
Not yet. If Lady B is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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