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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
MERRIMAC
MMSI 367091990 · Call sign WDC8717
Not yet on Master's MateType
Tug
Flag
USALength
24 m
Beam
8 m
Draft
3 m
Call sign
WDC8717
IMO
7436727
Official No.
512840
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
75
Registered in the United States, MERRIMAC is a 24-metre tug. Below, she has a beam of 8 m and a draft measuring 3 metres. On the registers she's MMSI 367091990, call sign WDC8717, IMO 7436727. Join MERRIMAC to the Master's Mate Safety Initiative Network — free, and built by cruisers for cruisers.
Free forever · No credit card · for working boats
Built for boats that work — like MERRIMAC.
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
Live AIS position · Jun 9, 2026 10:12 UTC
Position
36.8883° N, 76.3365° W
Status
Under way (engine)
Speed
5.6 kn
Course
175°
Destination
NORFOLK VA
ETA
09-01 06:00 UTC
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Joining the Safety Initiative Network doesn't just put MERRIMAC 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 MERRIMAC and switch it all on
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About MERRIMAC
What kind of vessel is MERRIMAC?
MERRIMAC is a Tug flagged to United States of America.
Where was MERRIMAC last seen?
MERRIMAC was last reported in Chesapeake Bay in Jun 2026 on public AIS.
What is MERRIMAC's MMSI?
MERRIMAC's MMSI is 367091990. Call sign WDC8717. IMO 7436727.
How big is MERRIMAC?
MERRIMAC is about 24 m long, 8 m on the beam, drawing 3 m.
Is MERRIMAC on the Master's Mate Safety Initiative Network?
Not yet. If MERRIMAC is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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