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

Sea C

MMSI 368253590 · Call sign WDM9539

Not yet on Master's Mate

Flag

USA

Call sign

WDM9539

Official No.

08160598

AIS reports

Registered in the United States, Sea C is a vessel. She broadcasts as MMSI 368253590, call sign WDM9539. Sea C is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.

Free forever · No credit card

Is Sea C 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 Sea C 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 Sea C 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 Sea C and switch it all on

Free to join · nothing to install to start · cancel anytime

Claim free → unlock everything

About Sea C

What kind of vessel is Sea C?

Sea C is a vessel flagged to United States of America.

What is Sea C's MMSI?

Sea C's MMSI is 368253590. Call sign WDM9539.

Is Sea C on the Master's Mate Safety Initiative Network?

Not yet. If Sea C is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).