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

UL SAN 109

MMSI 440144770 · Call sign 922517

Not yet on Master's Mate

Type

Tug

Flag

KOR

Call sign

922517

First reported

Jun 2026

Last reported

Jun 2026

AIS reports

UL SAN 109 is a working tug listed on the South Korea registry. She's on record as MMSI 440144770, call sign 922517. Bring UL SAN 109 aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.

Free forever · No credit card · for working boats

Built for boats that work — like UL SAN 109.

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 3, 2026

Track UL SAN 109 live — sign up free →

Position

35.1960° N, 129.2593° E

Working 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 working boats

The most powerful cruising platform ever built — yours, free.

Joining the Safety Initiative Network doesn't just put UL SAN 109 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.

Claim UL SAN 109 and switch it all on

Free to join · nothing to install to start · cancel anytime

Claim free → unlock everything

About UL SAN 109

What kind of vessel is UL SAN 109?

UL SAN 109 is a Tug flagged to South Korea.

Where was UL SAN 109 last seen?

UL SAN 109 was last reported in the Sea of Japan in Jun 2026 on public AIS.

What is UL SAN 109's MMSI?

UL SAN 109's MMSI is 440144770. Call sign 922517.

Is UL SAN 109 on the Master's Mate Safety Initiative Network?

Not yet. If UL SAN 109 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).