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.
Recreational
ATSA
MMSI 366986060 · Call sign WDB9987
Not yet on Master's MateType
Recreational
Flag
USALength
14.6 m
Beam
4.4 m
Draft
1.8 m
Call sign
WDB9987
Official No.
1100123
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
86
ATSA, a private cruiser under American registration, measures 14.6 metres on deck. Her hull carries 4.4 metres in the beam and a draft measuring 1.8 metres. She's listed under MMSI 366986060, call sign WDB9987. The Master's Mate Safety Initiative Network welcomes ATSA — free to join, cruiser-run, and always on watch.
Free forever · No credit card · for recreational captains
Keep ATSA looked after — even when you’re not aboard.
Anchor alarms that wake you, a live camera at the dock, and weather you can trust before every run.
Look after her — claim free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Last known position · Jun 4, 2026
Position
39.0036° N, 76.4578° W
Cruising 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 · for recreational captains
The most powerful cruising platform ever built — yours, free.
Joining the Safety Initiative Network doesn't just put ATSA 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.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
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.
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 ATSA and switch it all on
Free to join · nothing to install to start · cancel anytime
About ATSA
What kind of vessel is ATSA?
ATSA is a Recreational flagged to United States of America.
Where was ATSA last seen?
ATSA was last reported in Chesapeake Bay in Jun 2026 on public AIS.
What is ATSA's MMSI?
ATSA's MMSI is 366986060. Call sign WDB9987.
How big is ATSA?
ATSA is about 14.6 m long, 4.4 m on the beam, drawing 1.8 m.
Is ATSA on the Master's Mate Safety Initiative Network?
Not yet. If ATSA is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
© 2026 Master’s Mate. All rights reserved.