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 BOY
MMSI 366857130 · Call sign WDA8700
Not yet on Master's MateType
Towing Vessel
Flag
USALength
16 m
Beam
6.7 m
Draft
2.6 m
Call sign
WDA8700
Official No.
570106
AIS reports
1
BIG BOY, an utility vessel sailing under the American flag, measures 16 metres on deck. She's built with a beam of 6.7 m and a 2.6-metre draft. She's on record as MMSI 366857130, call sign WDA8700. Bring BIG BOY aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.
Free forever · No credit card · for working boats
Built for boats that work — like BIG BOY.
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 BOY 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 BOY 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 BOY and switch it all on
Free to join · nothing to install to start · cancel anytime
About BIG BOY
What kind of vessel is BIG BOY?
BIG BOY is a Towing Vessel flagged to United States of America.
What is BIG BOY's MMSI?
BIG BOY's MMSI is 366857130. Call sign WDA8700.
How big is BIG BOY?
BIG BOY is about 16 m long, 6.7 m on the beam, drawing 2.6 m.
Is BIG BOY on the Master's Mate Safety Initiative Network?
Not yet. If BIG BOY is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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