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.

Offshore Supply Vessel

DOCTOR JACK

MMSI 366726230 · Call sign WCW9242

Not yet on Master's Mate

Type

Offshore Supply Vessel

Flag

USA

Length

23.2 m

Beam

11.6 m

Draft

2.3 m

Call sign

WCW9242

IMO

8765905

Official No.

635861

AIS reports

Out of the United States, DOCTOR JACK is a 23.2-metre workboat. DOCTOR JACK has a beam measuring 11.6 metres and a 2.3 m draft. On AIS she shows as MMSI 366726230, call sign WCW9242, IMO 8765905. Add DOCTOR JACK to the Master's Mate Safety Initiative Network — free to join, and the fleet keeps an eye out for each other.

Free forever · No credit card · for working boats

Built for boats that work — like DOCTOR JACK.

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 DOCTOR JACK 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 DOCTOR JACK 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 DOCTOR JACK and switch it all on

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

Claim free → unlock everything

About DOCTOR JACK

What kind of vessel is DOCTOR JACK?

DOCTOR JACK is a Offshore Supply Vessel flagged to United States of America.

What is DOCTOR JACK's MMSI?

DOCTOR JACK's MMSI is 366726230. Call sign WCW9242. IMO 8765905.

How big is DOCTOR JACK?

DOCTOR JACK is about 23.2 m long, 11.6 m on the beam, drawing 2.3 m.

Is DOCTOR JACK on the Master's Mate Safety Initiative Network?

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