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.
Tanker
SATSUKI
MMSI 431007429 · Call sign JD3997
Not yet on Master's MateType
Tanker
Flag
JPNLength
64 m
Beam
10 m
Draft
3.6 m
Call sign
JD3997
IMO
9774393
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
14
A Japanese tank ship, SATSUKI measures 64 metres. She has a beam of 10 m and a draft of 3.6 m. She's listed under MMSI 431007429, call sign JD3997, IMO 9774393. SATSUKI is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
Free forever · No credit card · for commercial operators
Eyes on SATSUKI, around the clock.
Real-time AIS, full systems telemetry, distress alerting and worldwide charts — your hull on one dashboard, from anywhere.
Put her on the dashboard — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Last known position · Jun 3, 2026
Position
34.0840° N, 135.0008° E
Transiting 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 commercial operators
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put SATSUKI on the map. It hands you the full bridge:
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
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.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Anchor Watch
GPS-precise drag alarms that actually wake you — and your whole crew. Sleep through the night.
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 SATSUKI and switch it all on
Free to join · nothing to install to start · cancel anytime
About SATSUKI
What kind of vessel is SATSUKI?
SATSUKI is a Tanker flagged to Japan.
Where was SATSUKI last seen?
SATSUKI was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is SATSUKI's MMSI?
SATSUKI's MMSI is 431007429. Call sign JD3997. IMO 9774393.
How big is SATSUKI?
SATSUKI is about 64 m long, 10 m on the beam, drawing 3.6 m.
Is SATSUKI on the Master's Mate Safety Initiative Network?
Not yet. If SATSUKI is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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