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
SHONAI MARU
MMSI 431043000 · Call sign 7KDX
Not yet on Master's MateType
Cargo
Flag
JPNLength
249 m
Beam
43 m
Draft
12.7 m
Call sign
7KDX
IMO
9827231
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
50
SHONAI MARU is a cargo carrier flying the flag of Japan, 249 metres from stem to stern. She's built with a beam measuring 43 metres and a 12.7-metre draft. Find her under MMSI 431043000, call sign 7KDX, IMO 9827231. Join SHONAI MARU to the Master's Mate Safety Initiative Network — free, and built by cruisers for cruisers.
Free forever · No credit card · for commercial operators
Eyes on SHONAI 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 3, 2026
Position
38.3651° N, 141.9644° 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 SHONAI 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 SHONAI MARU and switch it all on
Free to join · nothing to install to start · cancel anytime
About SHONAI MARU
What kind of vessel is SHONAI MARU?
SHONAI MARU is a Cargo flagged to Japan.
Where was SHONAI MARU last seen?
SHONAI MARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is SHONAI MARU's MMSI?
SHONAI MARU's MMSI is 431043000. Call sign 7KDX. IMO 9827231.
How big is SHONAI MARU?
SHONAI MARU is about 249 m long, 43 m on the beam, drawing 12.7 m.
Is SHONAI MARU on the Master's Mate Safety Initiative Network?
Not yet. If SHONAI 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.