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.

Vessel

KOUKA MARU

last seen 35°N 135°E · Jun 2026 · MMSI 431000836 · Call sign JD2844

Not yet on Master's Mate

Length

68 m

Beam

11 m

Draft

4.4 m

Call sign

JD2844

IMO

9526851

First reported

Jun 2026

Last reported

Jun 2026

AIS reports

KOUKA MARU is a boat, 68 metres in length. She's built with a 11-metre beam and a 4.4 m draft. She's listed under MMSI 431000836, call sign JD2844, IMO 9526851. KOUKA MARU can be part of the Master's Mate Safety Initiative Network at no cost — a community watch that never sleeps.

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Your free claim unlocks the most powerful cruising platform ever built — anchor watch, worldwide charts, live AIS, weather routing, and a network of cruisers watching each other’s backs.

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Live AIS position · Jun 15, 2026 13:48 UTC

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Position

34.7164° N, 135.2945° E

Status

Under way (engine)

Speed

0.1 kn

Course

353°

Destination

JP UKB E3 CD

ETA

07-14 10:00 UTC

Crossing the Sea of Japan? You're never out there alone.

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Joining the Safety Initiative Network doesn't just put KOUKA MARU on the map. It hands you the full bridge:

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.

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.

Onboard Cameras

Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.

Systems Monitoring

Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.

Distress Mesh

Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.

Hail Any Captain

A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.

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About KOUKA MARU

What kind of vessel is KOUKA MARU?

KOUKA MARU is a vessel.

Where was KOUKA MARU last seen?

KOUKA MARU was last reported in the Sea of Japan in Jun 2026 on public AIS.

What is KOUKA MARU's MMSI?

KOUKA MARU's MMSI is 431000836. Call sign JD2844. IMO 9526851.

How big is KOUKA MARU?

KOUKA MARU is about 68 m long, 11 m on the beam, drawing 4.4 m.

Is KOUKA MARU on the Master's Mate Safety Initiative Network?

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