Just as a reminder, even in this day and age of automation and smart-everything, never underestimate the power of human error! In the below article link someone forgot to dog the external hatch of an Indian Akula-class submarine and it flooded the engineering section. While hatches aren't airlocks, I believe the type-S scout has a direct-access door from engineering directly to space. Atmosphere venting doesn't quite work the same way, but just imagine if someone leaves the rear hatch open and the scoutship decides to do an ocean refueling by landing in the water...
https://nationalinterest.org/blog/buzz/open-hatch-nearly-sunk-indias-new-3-billion-nuclear-missile-submarine-59812
https://nationalinterest.org/blog/buzz/open-hatch-nearly-sunk-indias-new-3-billion-nuclear-missile-submarine-59812