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
FOUR-ALARM
MMSI 367303220 · Call sign WBK5630
Not yet on Master's MateType
Recreational
Flag
USALength
10.4 m
Beam
4.1 m
Draft
1.8 m
Call sign
WBK5630
Official No.
585288
AIS reports
1
On the American registry, FOUR-ALARM is a 10.4-metre leisure boat. She carries a 4.1 m beam and a 1.8 m draft. She broadcasts as MMSI 367303220, call sign WBK5630. Claim FOUR-ALARM free and let the Master's Mate Safety Initiative Network keep an eye on her, on the water or off.
Free forever · No credit card · for recreational captains
Keep FOUR-ALARM 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 FOUR-ALARM 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 FOUR-ALARM 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 FOUR-ALARM and switch it all on
Free to join · nothing to install to start · cancel anytime
About FOUR-ALARM
What kind of vessel is FOUR-ALARM?
FOUR-ALARM is a Recreational flagged to United States of America.
What is FOUR-ALARM's MMSI?
FOUR-ALARM's MMSI is 367303220. Call sign WBK5630.
How big is FOUR-ALARM?
FOUR-ALARM is about 10.4 m long, 4.1 m on the beam, drawing 1.8 m.
Is FOUR-ALARM on the Master's Mate Safety Initiative Network?
Not yet. If FOUR-ALARM is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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