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
SECOND LINE
MMSI 366576730 · Call sign WCZ6632
Not yet on Master's MateType
Recreational
Flag
USALength
13 m
Beam
4.7 m
Draft
1.2 m
Call sign
WCZ6632
Official No.
639145
AIS reports
1
On the American registry, SECOND LINE is a 13-metre private vessel. Her hull carries a 4.7-metre beam and a draft measuring 1.2 metres. Officially she's MMSI 366576730, call sign WCZ6632. Put SECOND LINE on the Master's Mate Safety Initiative Network — free to claim, with a whole fleet watching out for her.
Free forever · No credit card · for recreational captains
Keep SECOND LINE 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 SECOND LINE 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 SECOND LINE 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 SECOND LINE and switch it all on
Free to join · nothing to install to start · cancel anytime
About SECOND LINE
What kind of vessel is SECOND LINE?
SECOND LINE is a Recreational flagged to United States of America.
What is SECOND LINE's MMSI?
SECOND LINE's MMSI is 366576730. Call sign WCZ6632.
How big is SECOND LINE?
SECOND LINE is about 13 m long, 4.7 m on the beam, drawing 1.2 m.
Is SECOND LINE on the Master's Mate Safety Initiative Network?
Not yet. If SECOND LINE 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.