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.
Vessel
SIR JEFFERY
MMSI 366579750 · Call sign WCF7500
Not yet on Master's MateFlag
USACall sign
WCF7500
Official No.
FL3661DK
AIS reports
1
SIR JEFFERY is an American craft. She's listed under MMSI 366579750, call sign WCF7500. Add SIR JEFFERY 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
Is SIR JEFFERY your boat?
Your free claim unlocks the most powerful cruising platform ever built — anchor watch, worldwide charts, live AIS, weather routing, and a network of cruisers watching each other’s backs.
Claim this boat — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Wherever SIR JEFFERY 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
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put SIR JEFFERY 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.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
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.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
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.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim SIR JEFFERY and switch it all on
Free to join · nothing to install to start · cancel anytime
About SIR JEFFERY
What kind of vessel is SIR JEFFERY?
SIR JEFFERY is a vessel flagged to United States of America.
What is SIR JEFFERY's MMSI?
SIR JEFFERY's MMSI is 366579750. Call sign WCF7500.
Is SIR JEFFERY on the Master's Mate Safety Initiative Network?
Not yet. If SIR JEFFERY is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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