MMSI 440413440 · Call sign 240022
Not yet on Master's Mate209 CHO YANG flies the South Korean flag — a 24-metre tug. She has 7 metres in the beam. On AIS she shows as MMSI 440413440, call sign 240022. Working vessels like 209 CHO YANG are never truly alone on the Master's Mate Safety Initiative Network — free, with a fleet on watch.
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
Joining the Safety Initiative Network doesn't just put 209 CHO YANG on the map. It hands you the full bridge:
© 2026 Master’s Mate. All rights reserved.