[3eb7988a1663]

The picture looks like the camera + storage SD card were in a sealed metal tube that was untouched.

[HPsquared]

It clearly received a nasty shock when the sub imploded; that's why the internal components were so broken.

[daemonologist]

Although the entire enclosure was shaken around enough to tear bits off the PCB via sheer inertia and crack the CPU (hence the need for the recovery process described).