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.

Industrial Vessel

MARY-O

MMSI 367529940 · Call sign WDG3815

Not yet on Master's Mate

Type

Industrial Vessel

Flag

USA

Length

16.1 m

Beam

4.2 m

Draft

1.4 m

Call sign

WDG3815

Official No.

275031

AIS reports

MARY-O is a merchant vessel flying the American flag, 16.1 metres overall. She carries 4.2 metres in the beam and a 1.4-metre draft. Find her under MMSI 367529940, call sign WDG3815. Add MARY-O to the Master's Mate Safety Initiative Network and share the water with a fleet that's paying attention — free.

Free forever · No credit card · for commercial operators

Eyes on MARY-O, around the clock.

Real-time AIS, full systems telemetry, distress alerting and worldwide charts — your hull on one dashboard, from anywhere.

Put her on the dashboard — free →

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

Wherever MARY-O 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 commercial operators

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

Joining the Safety Initiative Network doesn't just put MARY-O on the map. It hands you the full bridge:

Live AIS & Traffic

See every vessel around you in real time. Closest-approach warnings before they matter.

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.

Worldwide Charts

Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.

Weather & Routing

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

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.

Hail Any Captain

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

Claim MARY-O and switch it all on

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

Claim free → unlock everything

About MARY-O

What kind of vessel is MARY-O?

MARY-O is a Industrial Vessel flagged to United States of America.

What is MARY-O's MMSI?

MARY-O's MMSI is 367529940. Call sign WDG3815.

How big is MARY-O?

MARY-O is about 16.1 m long, 4.2 m on the beam, drawing 1.4 m.

Is MARY-O on the Master's Mate Safety Initiative Network?

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