Diving holidays have a unique rhythm—think relaxed surface intervals, evenings...

https://wiki-planet.win/index.php/Why_Does_My_Concentration_Drop_on_the_Third_Day_of_Diving%3F

Diving holidays have a unique rhythm—think relaxed surface intervals, evenings spent rinsing gear and swapping stories, and that peaceful lull between dives. One tip: download movies or books before you go, since WiFi tends to drop once you’re offshore