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.
Cargo
SUMIFUKU MARU
MMSI 431003685 · Call sign JD3367
Not yet on Master's MateType
Cargo
Flag
JPNLength
76 m
Beam
12 m
Draft
4.8 m
Call sign
JD3367
IMO
9660475
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
2
SUMIFUKU MARU is a Japanese cargo vessel — 76 metres overall. She's built with a beam measuring 12 metres and a 4.8-metre draft. Officially she's MMSI 431003685, call sign JD3367, IMO 9660475. It's free to add SUMIFUKU MARU to the Master's Mate Safety Initiative Network — like AAA for the ocean, run by the cruisers who use it.
Free forever · No credit card · for commercial operators
Eyes on SUMIFUKU MARU, 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 4, 2026
Position
39.7937° N, 139.9146° 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 SUMIFUKU MARU 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 SUMIFUKU MARU and switch it all on
Free to join · nothing to install to start · cancel anytime
About SUMIFUKU MARU
What kind of vessel is SUMIFUKU MARU?
SUMIFUKU MARU is a Cargo flagged to Japan.
Where was SUMIFUKU MARU last seen?
SUMIFUKU MARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is SUMIFUKU MARU's MMSI?
SUMIFUKU MARU's MMSI is 431003685. Call sign JD3367. IMO 9660475.
How big is SUMIFUKU MARU?
SUMIFUKU MARU is about 76 m long, 12 m on the beam, drawing 4.8 m.
Is SUMIFUKU MARU on the Master's Mate Safety Initiative Network?
Not yet. If SUMIFUKU MARU 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.