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.

Passenger (Inspected)

Great Blue

MMSI 367584770 · Call sign WDG9144

Not yet on Master's Mate

Type

Passenger (Inspected)

Flag

USA

Length

13.7 m

Beam

3.7 m

Draft

1.2 m

Call sign

WDG9144

Official No.

1227814

Hull ID

TXR00100F505

AIS reports

Great Blue, a ferry listed on the the United States registry, measures 13.7 metres on deck. Great Blue has a beam measuring 3.7 metres and a 1.2-metre draft. Her papers read MMSI 367584770, call sign WDG9144. Claim Great Blue free on the Master's Mate Safety Initiative Network and let nearby cruisers have her back.

Free forever · No credit card · for passenger & charter operators

Keep every soul aboard Great Blue safe.

Distress alerting, live AIS, onboard monitoring and weather routing — the safety stack for boats that carry people.

Switch on the safety stack — free →

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

Wherever Great Blue 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 passenger & charter operators

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

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

Distress Mesh

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

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.

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.

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 Great Blue and switch it all on

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

Claim free → unlock everything

About Great Blue

What kind of vessel is Great Blue?

Great Blue is a Passenger (Inspected) flagged to United States of America.

What is Great Blue's MMSI?

Great Blue's MMSI is 367584770. Call sign WDG9144.

How big is Great Blue?

Great Blue is about 13.7 m long, 3.7 m on the beam, drawing 1.2 m.

Is Great Blue on the Master's Mate Safety Initiative Network?

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