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.
Freight Barge
MARINE BUILDER 4
U.S. Official No. 1292846
Not yet on Master's MateType
Freight Barge
Flag
USALength
12.2 m
Beam
3.7 m
Draft
0.9 m
First reported
Jun 2026
AIS reports
1
On the American registry, MARINE BUILDER 4 is a 12.2-metre barge. She has a 3.7-metre beam and a draft of 0.9 m. Her papers read U.S. official number 1292846. Add MARINE BUILDER 4 to the Master's Mate Safety Initiative Network and share the water with a fleet that's paying attention — free.
Free forever · No credit card · for commercial operators
Eyes on MARINE BUILDER 4, around the clock.
Real-time AIS, full systems telemetry, distress alerting and worldwide charts — your hull on one dashboard, from anywhere.
Put her on the dashboard — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever MARINE BUILDER 4 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 commercial operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put MARINE BUILDER 4 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.
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.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
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.
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 MARINE BUILDER 4 and switch it all on
Free to join · nothing to install to start · cancel anytime
About MARINE BUILDER 4
What kind of vessel is MARINE BUILDER 4?
MARINE BUILDER 4 is a Freight Barge flagged to United States of America.
What is MARINE BUILDER 4's U.S. Official No.?
MARINE BUILDER 4's U.S. Official No. is 1292846.
How big is MARINE BUILDER 4?
MARINE BUILDER 4 is about 12.2 m long, 3.7 m on the beam, drawing 0.9 m.
Is MARINE BUILDER 4 on the Master's Mate Safety Initiative Network?
Not yet. If MARINE BUILDER 4 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.