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
big mama
MMSI 366988390 · Call sign WDC2132
Not yet on Master's MateType
Towing Vessel
Flag
USALength
17.8 m
Beam
7.9 m
Draft
2.9 m
Call sign
WDC2132
Official No.
500913
AIS reports
1
On the American registry, big mama is a 17.8-metre harbour workboat. Her hull carries a 7.9 m beam and a draft of 2.9 m. On the registers she's MMSI 366988390, call sign WDC2132. Join big mama to the Master's Mate Safety Initiative Network — free, and built by cruisers for cruisers.
Free forever · No credit card · for working boats
Built for boats that work — like big mama.
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 big mama 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 big mama 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 big mama and switch it all on
Free to join · nothing to install to start · cancel anytime
About big mama
What kind of vessel is big mama?
big mama is a Towing Vessel flagged to United States of America.
What is big mama's MMSI?
big mama's MMSI is 366988390. Call sign WDC2132.
How big is big mama?
big mama is about 17.8 m long, 7.9 m on the beam, drawing 2.9 m.
Is big mama on the Master's Mate Safety Initiative Network?
Not yet. If big mama is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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