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)
Republic IV
MMSI 366795770 · Call sign WDA3204
Not yet on Master's MateType
Passenger (Inspected)
Flag
USALength
11.5 m
Beam
4.1 m
Draft
2.1 m
Call sign
WDA3204
Official No.
642249
Hull ID
UUV042290981
AIS reports
1
Republic IV, a passenger vessel flying the flag of the United States, measures 11.5 metres on deck. She carries 4.1 metres in the beam and a 2.1 m draft. On AIS she appears as MMSI 366795770, call sign WDA3204. For a boat that carries people, Republic 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 Republic 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 Republic 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 Republic 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 Republic IV and switch it all on
Free to join · nothing to install to start · cancel anytime
About Republic IV
What kind of vessel is Republic IV?
Republic IV is a Passenger (Inspected) flagged to United States of America.
What is Republic IV's MMSI?
Republic IV's MMSI is 366795770. Call sign WDA3204.
How big is Republic IV?
Republic IV is about 11.5 m long, 4.1 m on the beam, drawing 2.1 m.
Is Republic IV on the Master's Mate Safety Initiative Network?
Not yet. If Republic IV is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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