One of our faithful FishFraud fans saw that and for some reason suspected it was bullshit, and emailed the information officer for the United States Coast Guard for the Northeastern United States. The response:
"Thank you for your inquiry. Being that this alleged incident took place within the last 10 years, we don't have any knowledge on it. If you could narrow down the date, you could possible file a FOIA request for any MISHAP reports occurring at the Station during that time frame. I will say it does sound highly doubtful that a CG Station Jones Beach asset would have flipped, but again I cannot comment either way without more background information. Coast Guard members typically transfer stations every 3-4 years, and I couldn't find anyone with knowledge of this incident."
Any such incident would result in an investigation and most likely be available online, but nothing can be found. Here is the report for a capsized USCG vessel in Alaska: