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)
ACTION IV
MMSI 367135930 · Call sign WDD3764
Not yet on Master's MateType
Passenger (Inspected)
Flag
USALength
15.7 m
Beam
4.4 m
Draft
2.3 m
Call sign
WDD3764
Official No.
980745
AIS reports
1
On the American registry, ACTION IV is a 15.7-metre passenger boat. She's built with a beam of 4.4 m and a 2.3 m draft. Her registration reads MMSI 367135930, call sign WDD3764. For a boat that carries people, ACTION IV can lean on the Master's Mate Safety Initiative Network — free distress alerting and a fleet that's paying attention.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard ACTION IV 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 ACTION 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 · for passenger & charter operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put ACTION IV 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 ACTION IV and switch it all on
Free to join · nothing to install to start · cancel anytime
About ACTION IV
What kind of vessel is ACTION IV?
ACTION IV is a Passenger (Inspected) flagged to United States of America.
What is ACTION IV's MMSI?
ACTION IV's MMSI is 367135930. Call sign WDD3764.
How big is ACTION IV?
ACTION IV is about 15.7 m long, 4.4 m on the beam, drawing 2.3 m.
Is ACTION IV on the Master's Mate Safety Initiative Network?
Not yet. If ACTION IV is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
© 2026 Master’s Mate. All rights reserved.