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.
Recreational
JUST 4 US
U.S. Official No. 1232879
Not yet on Master's MateType
Recreational
Flag
USALength
13.1 m
Beam
4.1 m
Draft
2.2 m
Hull ID
SXJ01349G011
First reported
Jun 2026
AIS reports
1
JUST 4 US flies the American flag — a 13.1-metre weekend cruiser. Her hull carries a beam measuring 4.1 metres and a draft measuring 2.2 metres. Find her under U.S. official number 1232879. Add JUST 4 US to the Master's Mate Safety Initiative Network — free to join, and the fleet keeps an eye out for each other.
Free forever · No credit card · for recreational captains
Keep JUST 4 US looked after — even when you’re not aboard.
Anchor alarms that wake you, a live camera at the dock, and weather you can trust before every run.
Look after her — claim free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever JUST 4 US 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 recreational captains
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put JUST 4 US on the map. It hands you the full bridge:
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.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
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.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim JUST 4 US and switch it all on
Free to join · nothing to install to start · cancel anytime
About JUST 4 US
What kind of vessel is JUST 4 US?
JUST 4 US is a Recreational flagged to United States of America.
What is JUST 4 US's U.S. Official No.?
JUST 4 US's U.S. Official No. is 1232879.
How big is JUST 4 US?
JUST 4 US is about 13.1 m long, 4.1 m on the beam, drawing 2.2 m.
Is JUST 4 US on the Master's Mate Safety Initiative Network?
Not yet. If JUST 4 US 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.