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.
Tanker
MAYARO
MMSI 431228000 · Call sign 7JUN
Not yet on Master's MateType
Tanker
Flag
JPNLength
175 m
Beam
28 m
Draft
7.4 m
Call sign
7JUN
IMO
9733703
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
10
MAYARO is a Japanese tank ship, spanning 175 metres. She has a beam of 28 m and a draft measuring 7.4 metres. She broadcasts as MMSI 431228000, call sign 7JUN, IMO 9733703. MAYARO is invited to the free Master's Mate Safety Initiative Network, where cruisers keep each other safe.
Free forever · No credit card · for commercial operators
Eyes on MAYARO, 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
37.9001° N, 8.8753° W
Wherever MAYARO roams, 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 MAYARO 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 MAYARO and switch it all on
Free to join · nothing to install to start · cancel anytime
About MAYARO
What kind of vessel is MAYARO?
MAYARO is a Tanker flagged to Japan.
Where was MAYARO last seen?
MAYARO was last reported in around 38°N 9°W in Jun 2026 on public AIS.
What is MAYARO's MMSI?
MAYARO's MMSI is 431228000. Call sign 7JUN. IMO 9733703.
How big is MAYARO?
MAYARO is about 175 m long, 28 m on the beam, drawing 7.4 m.
Is MAYARO on the Master's Mate Safety Initiative Network?
Not yet. If MAYARO is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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