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
Chemstar Sapphire
MMSI 538008644
Not yet on Master's MateFlag
MHLLength
145.2 m
IMO
9804904
AIS reports
2
On the Marshall Islands registry, Chemstar Sapphire is a 145.2-metre craft. She's on record as MMSI 538008644, IMO 9804904. The Master's Mate Safety Initiative Network welcomes Chemstar Sapphire — free to join, cruiser-run, and always on watch.
Free forever · No credit card
Is Chemstar Sapphire 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 9, 2026 23:45 UTC
Position
34.6397° S, 58.1011° W
Status
Under way (engine)
Speed
11.2 kn
Course
115°
Destination
AOLAD
ETA
06-09 12:00 UTC
Wherever Chemstar Sapphire 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
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put Chemstar Sapphire 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 Chemstar Sapphire and switch it all on
Free to join · nothing to install to start · cancel anytime
About Chemstar Sapphire
What kind of vessel is Chemstar Sapphire?
Chemstar Sapphire is a vessel flagged to Marshall Islands.
What is Chemstar Sapphire's MMSI?
Chemstar Sapphire's MMSI is 538008644. IMO 9804904.
How big is Chemstar Sapphire?
Chemstar Sapphire is about 145.2 m long.
Is Chemstar Sapphire on the Master's Mate Safety Initiative Network?
Not yet. If Chemstar Sapphire is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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