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.
Vessel
Great American IV
United States of America · MMSI 367574790 · Call sign WDG8177
Not yet on Master's MateFlag
USACall sign
WDG8177
AIS reports
2
Great American IV flies the American flag — a vessel. She broadcasts as MMSI 367574790, call sign WDG8177. Put Great American IV on the Master's Mate Safety Initiative Network — free to claim, with a whole fleet watching out for her.
Free forever · No credit card
Is Great American IV your boat?
Your free claim unlocks the most powerful cruising platform ever built — anchor watch, worldwide charts, live AIS, weather routing, and a network of cruisers watching each other’s backs.
Claim this boat — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever Great American IV 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
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Great American IV on the map. It hands you the full bridge:
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.
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.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim Great American IV and switch it all on
Free to join · nothing to install to start · cancel anytime
About Great American IV
What kind of vessel is Great American IV?
Great American IV is a vessel flagged to United States of America.
What is Great American IV's MMSI?
Great American IV's MMSI is 367574790. Call sign WDG8177.
Is Great American IV on the Master's Mate Safety Initiative Network?
Not yet. If Great American IV is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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