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

SEAS THE DAY

MMSI 366621890 · Call sign WCK4559

Not yet on Master's Mate

Flag

USA

Call sign

WCK4559

Official No.

WS9861LF

AIS reports

SEAS THE DAY is a vessel flying the American flag. On the registers she's MMSI 366621890, call sign WCK4559. SEAS THE DAY belongs on the Master's Mate Safety Initiative Network, a free safety net shared by boats the world over.

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Is SEAS THE DAY 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.

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Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers

Wherever SEAS THE DAY roams, you're never out there alone.

Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.

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The most powerful cruising platform ever built — yours, free.

Joining the Safety Initiative Network doesn't just put SEAS THE DAY 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 SEAS THE DAY and switch it all on

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About SEAS THE DAY

What kind of vessel is SEAS THE DAY?

SEAS THE DAY is a vessel flagged to United States of America.

What is SEAS THE DAY's MMSI?

SEAS THE DAY's MMSI is 366621890. Call sign WCK4559.

Is SEAS THE DAY on the Master's Mate Safety Initiative Network?

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