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.

Towing

7 CHANG RYONG

MMSI 440105640 · Call sign 947817

Not yet on Master's Mate

Type

Towing

Flag

KOR

Length

26 m

Beam

6 m

Call sign

947817

First reported

Jun 2026

Last reported

Jun 2026

AIS reports

On the South Korean registry, 7 CHANG RYONG is a 26-metre work boat. Her hull carries a beam measuring 6 metres. Her registration reads MMSI 440105640, call sign 947817. 7 CHANG RYONG can join the Master's Mate Safety Initiative Network for free: think of it as a watch network that has every boat's back.

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Built for boats that work — like 7 CHANG RYONG.

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

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Position

35.0950° N, 129.0384° 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 7 CHANG RYONG 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 7 CHANG RYONG

What kind of vessel is 7 CHANG RYONG?

7 CHANG RYONG is a Towing flagged to South Korea.

Where was 7 CHANG RYONG last seen?

7 CHANG RYONG was last reported in the Sea of Japan in Jun 2026 on public AIS.

What is 7 CHANG RYONG's MMSI?

7 CHANG RYONG's MMSI is 440105640. Call sign 947817.

How big is 7 CHANG RYONG?

7 CHANG RYONG is about 26 m long, 6 m on the beam.

Is 7 CHANG RYONG on the Master's Mate Safety Initiative Network?

Not yet. If 7 CHANG RYONG is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).