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)

Mack B

MMSI 368006070 · Call sign WDJ7371

Not yet on Master's Mate

Type

Passenger (Inspected)

Flag

USA

Length

14.3 m

Beam

5.2 m

Draft

2.6 m

Call sign

WDJ7371

Official No.

1281206

AIS reports

An American passenger boat, Mack B measures 14.3 metres. She's built with a beam of 5.2 m and a 2.6 m draft. She's on record as MMSI 368006070, call sign WDJ7371. Mack B is welcome on the Master's Mate Safety Initiative Network — a free, community-run watch where boats look out for one another.

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

Keep every soul aboard Mack B 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 Mack 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 passenger & charter operators

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

Joining the Safety Initiative Network doesn't just put Mack B 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 Mack B and switch it all on

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

Claim free → unlock everything

About Mack B

What kind of vessel is Mack B?

Mack B is a Passenger (Inspected) flagged to United States of America.

What is Mack B's MMSI?

Mack B's MMSI is 368006070. Call sign WDJ7371.

How big is Mack B?

Mack B is about 14.3 m long, 5.2 m on the beam, drawing 2.6 m.

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

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