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

Harmony

MMSI 368052920 · Call sign WDK4207

Not yet on Master's Mate

Type

Recreational

Flag

USA

Length

11.3 m

Beam

3.6 m

Draft

1.5 m

Call sign

WDK4207

Official No.

575146

AIS reports

Harmony is a pleasure boat flying the flag of the United States, 11.3 metres long. She has a beam measuring 3.6 metres and a draft of 1.5 m. On AIS she shows as MMSI 368052920, call sign WDK4207. Bring Harmony aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.

Free forever · No credit card · for recreational captains

Keep Harmony 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 Harmony 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 Harmony 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 Harmony and switch it all on

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

Claim free → unlock everything

About Harmony

What kind of vessel is Harmony?

Harmony is a Recreational flagged to United States of America.

What is Harmony's MMSI?

Harmony's MMSI is 368052920. Call sign WDK4207.

How big is Harmony?

Harmony is about 11.3 m long, 3.6 m on the beam, drawing 1.5 m.

Is Harmony on the Master's Mate Safety Initiative Network?

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