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
Spring Zephyr
MMSI 538007093
Not yet on Master's MateFlag
MHLLength
189.9 m
IMO
9781956
AIS reports
2
On the Marshall Islands registry, Spring Zephyr is an 189.9-metre boat. Her papers read MMSI 538007093, IMO 9781956. Bring Spring Zephyr aboard the Master's Mate Safety Initiative Network — free, and every captain on it has the others' backs.
Free forever · No credit card
Is Spring Zephyr 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 12:56 UTC
Position
39.2713° N, 76.5822° W
Status
Moored
Speed
0.0 kn
Course
252°
Destination
US BAL
ETA
06-07 17:00 UTC
Crossing Chesapeake Bay? 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 Spring Zephyr 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 Spring Zephyr and switch it all on
Free to join · nothing to install to start · cancel anytime
About Spring Zephyr
What kind of vessel is Spring Zephyr?
Spring Zephyr is a vessel flagged to Marshall Islands.
Where was Spring Zephyr last seen?
Spring Zephyr was last reported in Chesapeake Bay on public AIS.
What is Spring Zephyr's MMSI?
Spring Zephyr's MMSI is 538007093. IMO 9781956.
How big is Spring Zephyr?
Spring Zephyr is about 189.9 m long.
Is Spring Zephyr on the Master's Mate Safety Initiative Network?
Not yet. If Spring Zephyr is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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