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
CHANG WOO 1 HO
MMSI 440107590 · Call sign 031243
Not yet on Master's MateType
Tug
Flag
KORLength
23 m
Beam
7 m
Call sign
031243
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
85
CHANG WOO 1 HO is a harbour tug flagged in South Korea, 23 metres long. Below, she has a 7-metre beam. On the registers she's MMSI 440107590, call sign 031243. Put CHANG WOO 1 HO on the Master's Mate Safety Initiative Network — free to claim, with a whole fleet watching out for her.
Free forever · No credit card · for working boats
Built for boats that work — like CHANG WOO 1 HO.
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
Last known position · Jun 4, 2026
Position
35.0949° N, 129.0383° E
Working the Sea of Japan? You're never out there alone.
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Joining the Safety Initiative Network doesn't just put CHANG WOO 1 HO 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.
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About CHANG WOO 1 HO
What kind of vessel is CHANG WOO 1 HO?
CHANG WOO 1 HO is a Tug flagged to South Korea.
Where was CHANG WOO 1 HO last seen?
CHANG WOO 1 HO was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is CHANG WOO 1 HO's MMSI?
CHANG WOO 1 HO's MMSI is 440107590. Call sign 031243.
How big is CHANG WOO 1 HO?
CHANG WOO 1 HO is about 23 m long, 7 m on the beam.
Is CHANG WOO 1 HO on the Master's Mate Safety Initiative Network?
Not yet. If CHANG WOO 1 HO is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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