Dispatch 11: Mooring A Recovered
Jennifer Kosty (Yale University)
September 29, 2025
17:00 local, 74.59◦N, 150.00◦W
Conditions:
- Sunny, some clouds
- 0% sea ice cover
- -3◦C
- Sunrise: 29-Sept-2025 10:17
- Sunset: 29-Sept-2025 21:21
- Day length: 11 hours, 4 minutes
Today, we recovered Mooring A! The day started with the BGOS team (Jeff O’Brien, Tim McDonough, Jim Ryder, Cory Beatty, Jennifer Kosty) meeting at 6:45 am to identify Mooring A’s precise position. This process involved traveling to 3 locations, each approximately 1.5 km away from Mooring A’s drop location, where we sent an acoustic ping to its bottom releases. We used the signal’s travel time to determine Mooring A’s exact location, which was 37 m from where it was dropped last year.
The recovery process was then paused for a couple of hours as we waited for the sun to rise. Around 9:40 am, we had sufficient sunlight and visibility, so Jeff O’Brien released Mooring A from its bottom anchor. With the help of the deck crew, we were able to complete the recovery process by 2 pm!
Immediately following Mooring A’s recovery, the day watch began a 3800 m CTD rosette cast. Casts this deep can take upwards of 3 hours, so the watch remained busy through supper time. Meanwhile, the BGOS team spent the afternoon downloading and reviewing the data collected by Mooring A’s various instruments and preparing for redeployment.
Although our days remain busy with the CTD casts and mooring operations, there is still time for fun aboard the Louis! As we are steaming between stations, many of us will play card games, work on knitting projects, or head up to the helipad for a game of hacky sack. We are currently steaming towards CB-7, where another CTD rosette cast will be completed tonight. We plan to redeploy Mooring A early tomorrow morning before heading back north.







