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.

Towing Vessel

Helen B

MMSI 367048430 · Call sign WDC5916

Not yet on Master's Mate

Type

Towing Vessel

Flag

USA

Length

20.1 m

Beam

7.4 m

Draft

2.6 m

Call sign

WDC5916

Official No.

577517

AIS reports

Helen B is a workboat listed on the the United States registry, 20.1 metres in length. She's built with a beam measuring 7.4 metres and a 2.6 m draft. On AIS she appears as MMSI 367048430, call sign WDC5916. The Master's Mate Safety Initiative Network welcomes Helen B — free to join, cruiser-run, and always on watch.

Free forever · No credit card · for working boats

Built for boats that work — like Helen B.

Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.

Rig her out — free →

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

Wherever Helen B 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 working boats

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

Joining the Safety Initiative Network doesn't just put Helen B on the map. It hands you the full bridge:

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.

Weather & Routing

GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.

Distress Mesh

Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.

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.

Onboard Cameras

Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.

Hail Any Captain

A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.

Claim Helen B and switch it all on

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

Claim free → unlock everything

About Helen B

What kind of vessel is Helen B?

Helen B is a Towing Vessel flagged to United States of America.

What is Helen B's MMSI?

Helen B's MMSI is 367048430. Call sign WDC5916.

How big is Helen B?

Helen B is about 20.1 m long, 7.4 m on the beam, drawing 2.6 m.

Is Helen B on the Master's Mate Safety Initiative Network?

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