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.
Offshore Supply Vessel
C-Rambler
MMSI 338615000 · Call sign WMMU
Not yet on Master's MateType
Offshore Supply Vessel
Flag
USALength
73.2 m
Beam
17.1 m
Draft
6.4 m
Call sign
WMMU
IMO
9220251
Official No.
1087359
AIS reports
5
Registered in the United States, C-Rambler is a 73.2-metre working craft. Her hull carries a beam measuring 17.1 metres and a draft of 6.4 m. Her papers read MMSI 338615000, call sign WMMU, IMO 9220251. C-Rambler earns her keep on the water; the free Master's Mate Safety Initiative Network keeps a watching fleet and a distress mesh close at hand.
Free forever · No credit card · for working boats
Built for boats that work — like C-Rambler.
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 C-Rambler 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 C-Rambler 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 C-Rambler and switch it all on
Free to join · nothing to install to start · cancel anytime
About C-Rambler
What kind of vessel is C-Rambler?
C-Rambler is a Offshore Supply Vessel flagged to United States of America.
What is C-Rambler's MMSI?
C-Rambler's MMSI is 338615000. Call sign WMMU. IMO 9220251.
How big is C-Rambler?
C-Rambler is about 73.2 m long, 17.1 m on the beam, drawing 6.4 m.
Is C-Rambler on the Master's Mate Safety Initiative Network?
Not yet. If C-Rambler is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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