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

Harmonia

MMSI 367086780 · Call sign WDC8421

Not yet on Master's Mate

Type

Recreational

Flag

USA

Length

11.3 m

Beam

3.8 m

Draft

1.6 m

Call sign

WDC8421

Official No.

1153963

Hull ID

TCM37081A404

AIS reports

Harmonia is a weekend cruiser registered in the United States, spanning 11.3 metres. She has 3.8 metres in the beam and a draft measuring 1.6 metres. Look for MMSI 367086780, call sign WDC8421. Put Harmonia 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 Harmonia 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 Harmonia 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 Harmonia 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 Harmonia and switch it all on

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

Claim free → unlock everything

About Harmonia

What kind of vessel is Harmonia?

Harmonia is a Recreational flagged to United States of America.

What is Harmonia's MMSI?

Harmonia's MMSI is 367086780. Call sign WDC8421.

How big is Harmonia?

Harmonia is about 11.3 m long, 3.8 m on the beam, drawing 1.6 m.

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

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