Crush Depth

ive never owned/operated an RC or real sub but that phrase still makes me shudder

in real metal subs, basically the Weight of all the water literally CRUSHES the hull, (hence the name "Crush depth") pops hoses, bursts pipes e.t.c. But on RC subs its the depth when the pressure of the water outside is too much for the seals to take and so they burst or leak, if you are lucky you can retrive the sub before it takes on too much water and becomes too heavy to surface, but most other times, the sub just sinks because of all the water.