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.

Commercial Fishing Vessel

MR. MAC

MMSI 367347440 · Call sign WDE4021

Not yet on Master's Mate

Type

Commercial Fishing Vessel

Flag

USA

Length

19.7 m

Beam

6.1 m

Draft

3.4 m

Call sign

WDE4021

IMO

7739545

Official No.

590230

AIS reports

Out of the United States, MR. MAC is a 19.7-metre fishing vessel. She's built with a beam measuring 6.1 metres and a 3.4 m draft. On AIS she appears as MMSI 367347440, call sign WDE4021, IMO 7739545. Give MR. MAC the backing of the Master's Mate Safety Initiative Network — free, and a fleet that has her back.

Free forever · No credit card · for working captains

Know where the fleet is. Get MR. MAC home safe.

Live AIS traffic, weather you can plan around, engine & systems telemetry, and a distress mesh that reaches nearby boats.

Keep the fleet in sight — free →

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

Wherever MR. 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 captains

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

Joining the Safety Initiative Network doesn't just put MR. MAC 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.

Weather & Routing

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

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.

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 MR. MAC and switch it all on

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

Claim free → unlock everything

About MR. MAC

What kind of vessel is MR. MAC?

MR. MAC is a Commercial Fishing Vessel flagged to United States of America.

What is MR. MAC's MMSI?

MR. MAC's MMSI is 367347440. Call sign WDE4021. IMO 7739545.

How big is MR. MAC?

MR. MAC is about 19.7 m long, 6.1 m on the beam, drawing 3.4 m.

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

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