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)
RIVERS FLEETS IV
U.S. Official No. 515050
Not yet on Master's MateType
Passenger (Inspected)
Flag
USALength
10.5 m
Beam
4 m
Draft
1.6 m
First reported
Jun 2026
AIS reports
1
Registered in the United States, RIVERS FLEETS IV is a 10.5-metre excursion vessel. RIVERS FLEETS IV has a 4 m beam and a 1.6-metre draft. She's on record as U.S. official number 515050. Claim RIVERS FLEETS IV free on the Master's Mate Safety Initiative Network and let nearby cruisers have her back.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard RIVERS FLEETS 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 RIVERS FLEETS 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 RIVERS FLEETS 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 RIVERS FLEETS IV and switch it all on
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About RIVERS FLEETS IV
What kind of vessel is RIVERS FLEETS IV?
RIVERS FLEETS IV is a Passenger (Inspected) flagged to United States of America.
What is RIVERS FLEETS IV's U.S. Official No.?
RIVERS FLEETS IV's U.S. Official No. is 515050.
How big is RIVERS FLEETS IV?
RIVERS FLEETS IV is about 10.5 m long, 4 m on the beam, drawing 1.6 m.
Is RIVERS FLEETS IV on the Master's Mate Safety Initiative Network?
Not yet. If RIVERS FLEETS IV is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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