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 (Uninspected)
CHALLENGE II
MMSI 367312790 · Call sign WTG7102
Not yet on Master's MateType
Passenger (Uninspected)
Flag
USALength
19.4 m
Beam
6.2 m
Draft
3 m
Call sign
WTG7102
Official No.
512173
AIS reports
1
CHALLENGE II is an American 19.4-metre passenger vessel. CHALLENGE II has a 6.2-metre beam and a 3 m draft. On AIS she appears as MMSI 367312790, call sign WTG7102. CHALLENGE II is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard CHALLENGE II 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
Wherever CHALLENGE II 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 passenger & charter operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put CHALLENGE II 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 CHALLENGE II and switch it all on
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About CHALLENGE II
What kind of vessel is CHALLENGE II?
CHALLENGE II is a Passenger (Uninspected) flagged to United States of America.
What is CHALLENGE II's MMSI?
CHALLENGE II's MMSI is 367312790. Call sign WTG7102.
How big is CHALLENGE II?
CHALLENGE II is about 19.4 m long, 6.2 m on the beam, drawing 3 m.
Is CHALLENGE II on the Master's Mate Safety Initiative Network?
Not yet. If CHALLENGE II is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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