Diving trips have a unique rhythm—surface intervals give you time to relax, and...

https://sticky-wiki.win/index.php/Is_It_Weird_to_Go_to_Bed_at_9_PM_on_a_Liveaboard%3F

Diving trips have a unique rhythm—surface intervals give you time to relax, and quiet evenings after rinsing gear let you really unwind. A handy tip: download movies or shows before you head out, as WiFi often gets spotty once you’re offshore