For some reason I took this to mean you thought you needed the depth module to repair the tower: "Previously, it was necessary to repair the radio tower."
While above water you are vulnerable to weather and would otherwise constantly get colder even when it is sunny. To make it useful you'd need to swap to snow suit, which means that's even more stuff you need to carry on your person since the snowfox…
(Quote)
Just FYI you don't need the depth module to get the crashed ship parts. The smaller bit of the broken ship can be found on the slope of rocket island, at around 100m deep, entering the purple vents area from the west. It's near an …