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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
SEIWA MARU
MMSI 431200693 · Call sign JD2213
Not yet on Master's MateType
Cargo
Flag
JPNLength
167 m
Beam
31 m
Draft
7.6 m
Call sign
JD2213
IMO
9336933
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
56
SEIWA MARU is a general cargo ship registered in Japan, spanning 167 metres. Her hull carries a 31 m beam and a draft measuring 7.6 metres. On AIS she appears as MMSI 431200693, call sign JD2213, IMO 9336933. Claim SEIWA MARU free on the Master's Mate Safety Initiative Network and let nearby cruisers have her back.
Free forever · No credit card · for commercial operators
Eyes on SEIWA 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
38.2713° N, 141.0187° E
Transiting the Sea of Japan? You're never out there alone.
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Joining the Safety Initiative Network doesn't just put SEIWA 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 SEIWA MARU and switch it all on
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About SEIWA MARU
What kind of vessel is SEIWA MARU?
SEIWA MARU is a Cargo flagged to Japan.
Where was SEIWA MARU last seen?
SEIWA MARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is SEIWA MARU's MMSI?
SEIWA MARU's MMSI is 431200693. Call sign JD2213. IMO 9336933.
How big is SEIWA MARU?
SEIWA MARU is about 167 m long, 31 m on the beam, drawing 7.6 m.
Is SEIWA MARU on the Master's Mate Safety Initiative Network?
Not yet. If SEIWA MARU is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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