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.
Towing Vessel
REEF BUILDER
U.S. Official No. 1037724
Not yet on Master's MateType
Towing Vessel
Flag
USALength
7.8 m
Beam
4.2 m
Draft
1.4 m
Hull ID
OMI207001095
First reported
Jun 2026
AIS reports
1
REEF BUILDER, an American service vessel, measures 7.8 metres on deck. REEF BUILDER has 4.2 metres in the beam and a 1.4 m draft. Her registration reads U.S. official number 1037724. Working vessels like REEF BUILDER are never truly alone on the Master's Mate Safety Initiative Network — free, with a fleet on watch.
Free forever · No credit card · for working boats
Built for boats that work — like REEF BUILDER.
Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.
Rig her out — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever REEF BUILDER 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 boats
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put REEF BUILDER on the map. It hands you the full bridge:
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
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.
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 REEF BUILDER and switch it all on
Free to join · nothing to install to start · cancel anytime
About REEF BUILDER
What kind of vessel is REEF BUILDER?
REEF BUILDER is a Towing Vessel flagged to United States of America.
What is REEF BUILDER's U.S. Official No.?
REEF BUILDER's U.S. Official No. is 1037724.
How big is REEF BUILDER?
REEF BUILDER is about 7.8 m long, 4.2 m on the beam, drawing 1.4 m.
Is REEF BUILDER on the Master's Mate Safety Initiative Network?
Not yet. If REEF BUILDER is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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