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.

Towing Vessel

CAPT MAC

MMSI 366928020 · Call sign WYT5631

Not yet on Master's Mate

Type

Towing Vessel

Flag

USA

Length

16.3 m

Beam

4.2 m

Draft

1.6 m

Call sign

WYT5631

Official No.

275590

AIS reports

On the American registry, CAPT MAC is a 16.3-metre service vessel. She's built with a beam measuring 4.2 metres and a 1.6 m draft. Officially she's MMSI 366928020, call sign WYT5631. Put CAPT MAC on the free Master's Mate Safety Initiative Network and keep the working fleet looking out for each other.

Free forever · No credit card · for working boats

Built for boats that work — like CAPT MAC.

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 CAPT MAC 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 CAPT MAC 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 CAPT MAC and switch it all on

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

Claim free → unlock everything

About CAPT MAC

What kind of vessel is CAPT MAC?

CAPT MAC is a Towing Vessel flagged to United States of America.

What is CAPT MAC's MMSI?

CAPT MAC's MMSI is 366928020. Call sign WYT5631.

How big is CAPT MAC?

CAPT MAC is about 16.3 m long, 4.2 m on the beam, drawing 1.6 m.

Is CAPT MAC on the Master's Mate Safety Initiative Network?

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