TIL submarines can fire ballistic missiles while submerged. It helps them maintain stealth. Here's a video from the 60's showing Polaris firings: https://en.

TIL submarines can fire ballistic missiles while submerged. It helps them maintain stealth. Here's a video from the 60's showing Polaris firings: https://en.m.wikipedia.org/wiki/File:1960-07-21_First_Polaris_Firing_By_Submerged_U-Boat.ogv https://en.m.wikipedia.org/wiki/File:1960-07-21_First_Polari...