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
Thunderbird
MMSI 367406120 · Call sign WDE8490
Not yet on Master's MateType
Towing Vessel
Flag
USALength
28.4 m
Beam
7.6 m
Draft
3.5 m
Call sign
WDE8490
IMO
8841802
Official No.
243309
AIS reports
1
On the American registry, Thunderbird is a 28.4-metre workboat. She carries a beam of 7.6 m and a 3.5 m draft. On AIS she shows as MMSI 367406120, call sign WDE8490, IMO 8841802. Thunderbird 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 working boats
Built for boats that work — like Thunderbird.
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 Thunderbird 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 Thunderbird 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 Thunderbird and switch it all on
Free to join · nothing to install to start · cancel anytime
About Thunderbird
What kind of vessel is Thunderbird?
Thunderbird is a Towing Vessel flagged to United States of America.
What is Thunderbird's MMSI?
Thunderbird's MMSI is 367406120. Call sign WDE8490. IMO 8841802.
How big is Thunderbird?
Thunderbird is about 28.4 m long, 7.6 m on the beam, drawing 3.5 m.
Is Thunderbird on the Master's Mate Safety Initiative Network?
Not yet. If Thunderbird is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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