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
ULSAN 103
MMSI 440137320 · Call sign 150010
Not yet on Master's MateType
Tug
Flag
KORLength
26 m
Beam
8 m
Draft
3.8 m
Call sign
150010
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
28
ULSAN 103, a tugboat on the South Korea registry, measures 26 metres on deck. ULSAN 103 has a beam of 8 m and a 3.8 m draft. On AIS she shows as MMSI 440137320, call sign 150010. Join ULSAN 103 to the Master's Mate Safety Initiative Network — free, and built by cruisers for cruisers.
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Built for boats that work — like ULSAN 103.
Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.
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Last known position · Jun 3, 2026
Position
35.2517° N, 129.3079° E
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Joining the Safety Initiative Network doesn't just put ULSAN 103 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 ULSAN 103
What kind of vessel is ULSAN 103?
ULSAN 103 is a Tug flagged to South Korea.
Where was ULSAN 103 last seen?
ULSAN 103 was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is ULSAN 103's MMSI?
ULSAN 103's MMSI is 440137320. Call sign 150010.
How big is ULSAN 103?
ULSAN 103 is about 26 m long, 8 m on the beam, drawing 3.8 m.
Is ULSAN 103 on the Master's Mate Safety Initiative Network?
Not yet. If ULSAN 103 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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