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.
Commercial Fishing Vessel
ACT IV
MMSI 367023630 · Call sign WDC4366
Not yet on Master's MateType
Commercial Fishing Vessel
Flag
USALength
25.8 m
Beam
7.6 m
Draft
4.1 m
Call sign
WDC4366
IMO
8608274
Official No.
679608
AIS reports
1
Out of the United States, ACT IV is a 25.8-metre fishing vessel. She's built with a 7.6-metre beam and a 4.1-metre draft. On the registers she's MMSI 367023630, call sign WDC4366, IMO 8608274. ACT IV belongs on the Master's Mate Safety Initiative Network, a free safety net shared by boats the world over.
Free forever · No credit card · for working captains
Know where the fleet is. Get ACT IV home safe.
Live AIS traffic, weather you can plan around, engine & systems telemetry, and a distress mesh that reaches nearby boats.
Keep the fleet in sight — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever ACT 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 working captains
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put ACT IV on the map. It hands you the full bridge:
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.
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.
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 ACT IV and switch it all on
Free to join · nothing to install to start · cancel anytime
About ACT IV
What kind of vessel is ACT IV?
ACT IV is a Commercial Fishing Vessel flagged to United States of America.
What is ACT IV's MMSI?
ACT IV's MMSI is 367023630. Call sign WDC4366. IMO 8608274.
How big is ACT IV?
ACT IV is about 25.8 m long, 7.6 m on the beam, drawing 4.1 m.
Is ACT IV on the Master's Mate Safety Initiative Network?
Not yet. If ACT 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.