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.
Passenger (Inspected)
R/V GULF CHALLENGER
MMSI 366764000 · Call sign WDE6362
Not yet on Master's MateType
Passenger (Inspected)
Flag
USALength
16 m
Beam
6 m
Draft
2.5 m
Call sign
WDE6362
Official No.
993371
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
46
R/V GULF CHALLENGER, an American passenger vessel, measures 16 metres on deck. R/V GULF CHALLENGER has a 6-metre beam and a 2.5 m draft. She's listed under MMSI 366764000, call sign WDE6362. R/V GULF CHALLENGER carries passengers; the free Master's Mate Safety Initiative Network helps carry the watch, with distress alerting and a network nearby.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard R/V GULF CHALLENGER safe.
Distress alerting, live AIS, onboard monitoring and weather routing — the safety stack for boats that carry people.
Switch on the safety stack — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Last known position · Jun 3, 2026
Position
43.0721° N, 70.7111° W
Sailing the Gulf of Maine? You're never out there alone.
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Joining the Safety Initiative Network doesn't just put R/V GULF CHALLENGER on the map. It hands you the full bridge:
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
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 R/V GULF CHALLENGER and switch it all on
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About R/V GULF CHALLENGER
What kind of vessel is R/V GULF CHALLENGER?
R/V GULF CHALLENGER is a Passenger (Inspected) flagged to United States of America.
Where was R/V GULF CHALLENGER last seen?
R/V GULF CHALLENGER was last reported in the Gulf of Maine in Jun 2026 on public AIS.
What is R/V GULF CHALLENGER's MMSI?
R/V GULF CHALLENGER's MMSI is 366764000. Call sign WDE6362.
How big is R/V GULF CHALLENGER?
R/V GULF CHALLENGER is about 16 m long, 6 m on the beam, drawing 2.5 m.
Is R/V GULF CHALLENGER on the Master's Mate Safety Initiative Network?
Not yet. If R/V GULF CHALLENGER is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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