Regatta race countdown timer. I'm not a sailor but that's what it says.
A regatta timer is a special type of watch that helps sailors time their starts in a yacht race. A regatta timer usually has a countdown function that can be set to different intervals, such as 5, 10, or 15 minutes, depending on the race rules. The countdown function helps sailors synchronize their watches with the race signals and cross the starting line at the right moment.
Source: Conversation with Bing, 11/17/2023
