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
SUMIYO
Cargo · last seen 35°N 135°E · Jun 2026 · MMSI 431012083 · Call sign JD4454
Not yet on Master's MateType
Cargo
Length
75 m
Beam
12 m
Draft
4.5 m
Call sign
JD4454
IMO
9853149
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
6
SUMIYO is a merchant ship, 75 metres on deck. She has a 12 m beam and a draft measuring 4.5 metres. She broadcasts as MMSI 431012083, call sign JD4454, IMO 9853149. Claim SUMIYO 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 SUMIYO, 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
Live AIS position · Jun 15, 2026 13:15 UTC
Position
34.7187° N, 135.2966° E
Status
Moored
Speed
0.0 kn
Course
245°
Destination
JP UBK E4
ETA
06-15 17:30 UTC
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 SUMIYO 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 SUMIYO and switch it all on
Free to join · nothing to install to start · cancel anytime
About SUMIYO
What kind of vessel is SUMIYO?
SUMIYO is a Cargo.
Where was SUMIYO last seen?
SUMIYO was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is SUMIYO's MMSI?
SUMIYO's MMSI is 431012083. Call sign JD4454. IMO 9853149.
How big is SUMIYO?
SUMIYO is about 75 m long, 12 m on the beam, drawing 4.5 m.
Is SUMIYO on the Master's Mate Safety Initiative Network?
Not yet. If SUMIYO 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.