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.
Vessel
SY4
last seen 34°S 151°E · Jun 2026 · MMSI 503174470
Not yet on Master's MateFirst reported
Jun 2026
Last reported
Jun 2026
AIS reports
6
SY4 is a boat. On AIS she shows as MMSI 503174470. SY4 is welcome on the Master's Mate Safety Initiative Network — a free, community-run watch where boats look out for one another.
Free forever · No credit card
Is SY4 your boat?
Your free claim unlocks the most powerful cruising platform ever built — anchor watch, worldwide charts, live AIS, weather routing, and a network of cruisers watching each other’s backs.
Claim this boat — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Live AIS position · Jun 16, 2026 00:38 UTC
Position
33.9902° S, 151.1889° E
Status
Under way (engine)
Speed
32.3 kn
Course
277°
Crossing the Tasman Sea? 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
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put SY4 on the map. It hands you the full bridge:
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.
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.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
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.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim SY4 and switch it all on
Free to join · nothing to install to start · cancel anytime
About SY4
What kind of vessel is SY4?
SY4 is a vessel.
Where was SY4 last seen?
SY4 was last reported in the Tasman Sea in Jun 2026 on public AIS.
What is SY4's MMSI?
SY4's MMSI is 503174470.
Is SY4 on the Master's Mate Safety Initiative Network?
Not yet. If SY4 is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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