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.
Cargo
STAR CHALLENGER
MMSI 440401000 · Call sign D7CH
Not yet on Master's MateType
Cargo
Flag
KORLength
141 m
Beam
25 m
Draft
7.1 m
Call sign
D7CH
IMO
9754783
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
9
STAR CHALLENGER, a merchant vessel sailing under the South Korean flag, measures 141 metres on deck. She carries 25 metres in the beam and a 7.1 m draft. On the registers she's MMSI 440401000, call sign D7CH, IMO 9754783. STAR CHALLENGER can be part of the Master's Mate Safety Initiative Network at no cost — a community watch that never sleeps.
Free forever · No credit card · for commercial operators
Eyes on STAR 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
Last known position · Jun 4, 2026
Position
35.0863° N, 129.0875° E
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.
Free with your claim · for commercial operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put STAR 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 STAR CHALLENGER and switch it all on
Free to join · nothing to install to start · cancel anytime
About STAR CHALLENGER
What kind of vessel is STAR CHALLENGER?
STAR CHALLENGER is a Cargo flagged to South Korea.
Where was STAR CHALLENGER last seen?
STAR CHALLENGER was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is STAR CHALLENGER's MMSI?
STAR CHALLENGER's MMSI is 440401000. Call sign D7CH. IMO 9754783.
How big is STAR CHALLENGER?
STAR CHALLENGER is about 141 m long, 25 m on the beam, drawing 7.1 m.
Is STAR CHALLENGER on the Master's Mate Safety Initiative Network?
Not yet. If STAR CHALLENGER is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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