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
CHALLENGER
MMSI 367466730 · Call sign WDF5742
Not yet on Master's MateType
Tug
Flag
USALength
21 m
Beam
6 m
Draft
3 m
Call sign
WDF5742
Official No.
635043
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
60
CHALLENGER is an American working tug, 21 metres overall. She carries 6 metres in the beam and a 3-metre draft. Her papers read MMSI 367466730, call sign WDF5742. Give CHALLENGER 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 boats
Built for boats that work — like CHALLENGER.
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 10:33 UTC
Position
40.6403° N, 74.1944° W
Status
Under way (engine)
Speed
0.1 kn
Course
276°
Destination
NEW YORK, NY
ETA
10-01 12:30 UTC
Working off the U.S. East Coast? 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 CHALLENGER 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 CHALLENGER and switch it all on
Free to join · nothing to install to start · cancel anytime
About CHALLENGER
What kind of vessel is CHALLENGER?
CHALLENGER is a Tug flagged to United States of America.
Where was CHALLENGER last seen?
CHALLENGER was last reported in off the U.S. East Coast in Jun 2026 on public AIS.
What is CHALLENGER's MMSI?
CHALLENGER's MMSI is 367466730. Call sign WDF5742.
How big is CHALLENGER?
CHALLENGER is about 21 m long, 6 m on the beam, drawing 3 m.
Is CHALLENGER on the Master's Mate Safety Initiative Network?
Not yet. If CHALLENGER is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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