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.
Passenger (Inspected)
BIG THUNDER
MMSI 367065920 · Call sign WDC7083
Not yet on Master's MateType
Passenger (Inspected)
Flag
USALength
30.1 m
Beam
6.7 m
Draft
2.3 m
Call sign
WDC7083
Official No.
640135
AIS reports
1
Registered in the United States, BIG THUNDER is a 30.1-metre passenger ferry. She has a 6.7-metre beam and a draft of 2.3 m. Her papers read MMSI 367065920, call sign WDC7083. BIG THUNDER can join the Master's Mate Safety Initiative Network for free: think of it as a watch network that has every boat's back.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard BIG THUNDER safe.
Distress alerting, live AIS, onboard monitoring and weather routing — the safety stack for boats that carry people.
Switch on the safety stack — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever BIG THUNDER 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 passenger & charter operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put BIG THUNDER on the map. It hands you the full bridge:
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
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 THUNDER and switch it all on
Free to join · nothing to install to start · cancel anytime
About BIG THUNDER
What kind of vessel is BIG THUNDER?
BIG THUNDER is a Passenger (Inspected) flagged to United States of America.
What is BIG THUNDER's MMSI?
BIG THUNDER's MMSI is 367065920. Call sign WDC7083.
How big is BIG THUNDER?
BIG THUNDER is about 30.1 m long, 6.7 m on the beam, drawing 2.3 m.
Is BIG THUNDER on the Master's Mate Safety Initiative Network?
Not yet. If BIG THUNDER is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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