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
SIGNET THUNDER
MMSI 369579000 · Call sign WDH4914
Not yet on Master's MateType
Towing Vessel
Flag
USALength
36.6 m
Beam
11 m
Draft
5.8 m
Call sign
WDH4914
IMO
9253571
Official No.
1120750
AIS reports
3
SIGNET THUNDER, a work boat sailing under the American flag, measures 36.6 metres on deck. Her hull carries a beam of 11 m and a draft measuring 5.8 metres. She's on record as MMSI 369579000, call sign WDH4914, IMO 9253571. Join SIGNET THUNDER 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 SIGNET THUNDER.
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 SIGNET 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 working boats
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put SIGNET THUNDER 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 SIGNET THUNDER and switch it all on
Free to join · nothing to install to start · cancel anytime
About SIGNET THUNDER
What kind of vessel is SIGNET THUNDER?
SIGNET THUNDER is a Towing Vessel flagged to United States of America.
What is SIGNET THUNDER's MMSI?
SIGNET THUNDER's MMSI is 369579000. Call sign WDH4914. IMO 9253571.
How big is SIGNET THUNDER?
SIGNET THUNDER is about 36.6 m long, 11 m on the beam, drawing 5.8 m.
Is SIGNET THUNDER on the Master's Mate Safety Initiative Network?
Not yet. If SIGNET THUNDER is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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