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.
Tanker
C. CHALLENGER
MMSI 441450000 · Call sign D7OM
Not yet on Master's MateType
Tanker
Flag
KORLength
333 m
Beam
60 m
Draft
11 m
Call sign
D7OM
IMO
9595620
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
85
C. CHALLENGER is a South Korean tanker — 333 metres overall. C. CHALLENGER has a beam measuring 60 metres and a 11-metre draft. Her papers read MMSI 441450000, call sign D7OM, IMO 9595620. Big or small, every hull benefits from the free Master's Mate Safety Initiative Network — C. CHALLENGER included.
Free forever · No credit card · for commercial operators
Eyes on C. CHALLENGER, around the clock.
Real-time AIS, full systems telemetry, distress alerting and worldwide charts — your hull on one dashboard, from anywhere.
Put her on the dashboard — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Live AIS position · Jun 9, 2026 13:17 UTC
Position
34.8522° N, 128.7941° E
Status
At anchor
Speed
0.2 kn
Course
186°
Destination
KRGJE
ETA
06-08 23:30 UTC
Transiting the Sea of Japan? 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 C. CHALLENGER on the map. It hands you the full bridge:
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.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
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.
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 C. CHALLENGER and switch it all on
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About C. CHALLENGER
What kind of vessel is C. CHALLENGER?
C. CHALLENGER is a Tanker flagged to South Korea.
Where was C. CHALLENGER last seen?
C. CHALLENGER was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is C. CHALLENGER's MMSI?
C. CHALLENGER's MMSI is 441450000. Call sign D7OM. IMO 9595620.
How big is C. CHALLENGER?
C. CHALLENGER is about 333 m long, 60 m on the beam, drawing 11 m.
Is C. CHALLENGER on the Master's Mate Safety Initiative Network?
Not yet. If C. CHALLENGER is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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