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.
Tug
CAPTAIN MAC
MMSI 367489820 · Call sign WDM8837
Not yet on Master's MateType
Tug
Flag
USALength
15 m
Beam
6 m
Draft
2.2 m
Call sign
WDM8837
Official No.
625116
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
63
CAPTAIN MAC is an American tugboat, measuring 15 metres. She's built with a 6-metre beam and a 2.2 m draft. Her papers read MMSI 367489820, call sign WDM8837. Add CAPTAIN MAC 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 CAPTAIN 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
Last known position · Jun 3, 2026
Position
39.0070° N, 76.4042° W
Working Chesapeake Bay? You're never out there alone.
Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.
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The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put CAPTAIN 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 CAPTAIN MAC and switch it all on
Free to join · nothing to install to start · cancel anytime
About CAPTAIN MAC
What kind of vessel is CAPTAIN MAC?
CAPTAIN MAC is a Tug flagged to United States of America.
Where was CAPTAIN MAC last seen?
CAPTAIN MAC was last reported in Chesapeake Bay in Jun 2026 on public AIS.
What is CAPTAIN MAC's MMSI?
CAPTAIN MAC's MMSI is 367489820. Call sign WDM8837.
How big is CAPTAIN MAC?
CAPTAIN MAC is about 15 m long, 6 m on the beam, drawing 2.2 m.
Is CAPTAIN MAC on the Master's Mate Safety Initiative Network?
Not yet. If CAPTAIN MAC is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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