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

HELEN B IV

U.S. Official No. 515859

Not yet on Master's Mate

Type

Recreational

Flag

USA

Length

10.1 m

Beam

3.8 m

Draft

1.4 m

First reported

Jun 2026

AIS reports

HELEN B IV, a private vessel registered in the United States, measures 10.1 metres on deck. She has a beam measuring 3.8 metres and a draft measuring 1.4 metres. On the registers she's U.S. official number 515859. Whether she's at the dock or out for the weekend, HELEN B IV is covered by the free Master's Mate Safety Initiative Network — alarms, weather, and a watching fleet.

Free forever · No credit card · for recreational captains

Keep HELEN B IV 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 HELEN B IV 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 HELEN B IV 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 HELEN B IV and switch it all on

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

Claim free → unlock everything

About HELEN B IV

What kind of vessel is HELEN B IV?

HELEN B IV is a Recreational flagged to United States of America.

What is HELEN B IV's U.S. Official No.?

HELEN B IV's U.S. Official No. is 515859.

How big is HELEN B IV?

HELEN B IV is about 10.1 m long, 3.8 m on the beam, drawing 1.4 m.

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

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