The previous photo was of the start of the Everglades Challenge, the early spring jaunt for small craft (human or sail powered) down the West Coast of Florida, a distance of 300 miles. The start is at dawn, just above Tampa Bay, and this photo, lifted from the InterWebs, shows some of the more sensible small boat cruisers launching. The winners of the race are usually hi-powered catamarans or hi-powered big dinghies (such as Jeff Linton's Spawn of FrankenScot).
From YouTube, here is the start of the 2018 Everglades Challenge:
And from the Earwigoagin archives; all posts that have Everglades Challenge mentioned, at least once.