Sign up free Dashboard Log out
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

KIYOSUMI

Tug · last seen 35°N 140°E · Jun 2026 · MMSI 431005532 · Call sign JD3691

Not yet on Master's Mate
Type
Tug
Length
34 m
Beam
12 m
Draft
3.5 m
Call sign
JD3691
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
11

KIYOSUMI is a working tug, 34 metres from stem to stern. She carries a beam measuring 12 metres and a 3.5-metre draft. She's listed under MMSI 431005532, call sign JD3691. KIYOSUMI can be part of the Master's Mate Safety Initiative Network at no cost — a community watch that never sleeps.

Free forever · No credit card · for working boats

Built for boats that work — like KIYOSUMI.

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

Live AIS position · Jun 15, 2026 18:32 UTC
Position
35.4446° N, 139.6772° E
Status
Under way (engine)
Speed
0.1 kn
Course
220°
Destination
JP YOK
ETA
01-10 16:30 UTC
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 KIYOSUMI 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 KIYOSUMI and switch it all on
Free to join · nothing to install to start · cancel anytime
Claim free → unlock everything

About KIYOSUMI

What kind of vessel is KIYOSUMI?
KIYOSUMI is a Tug.
Where was KIYOSUMI last seen?
KIYOSUMI was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is KIYOSUMI's MMSI?
KIYOSUMI's MMSI is 431005532. Call sign JD3691.
How big is KIYOSUMI?
KIYOSUMI is about 34 m long, 12 m on the beam, drawing 3.5 m.
Is KIYOSUMI on the Master's Mate Safety Initiative Network?
Not yet. If KIYOSUMI is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).

© 2026 Master’s Mate. All rights reserved.