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.
Tug
ASAKA MARU
MMSI 431024291 · Call sign JD5396
Not yet on Master's MateType
Tug
Flag
JPNLength
32 m
Beam
11 m
Draft
4.5 m
Call sign
JD5396
IMO
1056587
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
22
Registered in Japan, ASAKA MARU is a 32-metre tugboat. She carries a beam measuring 11 metres and a 4.5 m draft. On AIS she shows as MMSI 431024291, call sign JD5396, IMO 1056587. ASAKA MARU can be part of the Master's Mate Safety Initiative Network at no cost — a community watch that never sleeps.
Free forever · No credit card · for working boats
Built for boats that work — like ASAKA MARU.
Engine & systems telemetry, live AIS, weather and distress alerting for the vessels that earn their keep.
Rig her out — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Last known position · Jun 3, 2026
Position
37.8451° N, 140.9607° E
Working 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.
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The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put ASAKA MARU on the map. It hands you the full bridge:
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Anchor Watch
GPS-precise drag alarms that actually wake you — and your whole crew. Sleep through the night.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
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 ASAKA MARU and switch it all on
Free to join · nothing to install to start · cancel anytime
About ASAKA MARU
What kind of vessel is ASAKA MARU?
ASAKA MARU is a Tug flagged to Japan.
Where was ASAKA MARU last seen?
ASAKA MARU was last reported in the Sea of Japan in Jun 2026 on public AIS.
What is ASAKA MARU's MMSI?
ASAKA MARU's MMSI is 431024291. Call sign JD5396. IMO 1056587.
How big is ASAKA MARU?
ASAKA MARU is about 32 m long, 11 m on the beam, drawing 4.5 m.
Is ASAKA MARU on the Master's Mate Safety Initiative Network?
Not yet. If ASAKA MARU is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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