The parameters that determine how deep an ROV can go

[95yusufabdullah]

I'd like to ask;
1) Besides materials used to construct the ROV and its parts, what other parameters determine how deep an ROV can go before failing/breaking apart/imploding?
2) Since the deeper it goes, the higher the pressure on the ROV, is it true that the higher the pressure on the ROV, the stronger the motors/thrusters have to be for the ROV to be able to move under such pressure?

 

[LittleWheels]

Is the ROV's internal pressure balanced with the external pressure? Is the ROV sealed and a 'dry environment'?

Why do you think the thrusters need to be stronger at depth? The viscosity barely changes with temperature or depth. Seal drag for the shafts may alter, depending on the ROV construction.

 

[waross]

is it true that the higher the pressure on the ROV, the stronger the motors/thrusters have to be for the ROV to be able to move under such pressure?

No.

 

[IRstuff]

What is your definition of ROV? Mine is Remotely Operated Vehicle; if that you definition, there ought not be a need for large pressurized spaces, since there won't be anyone that needs those spaces. Cameras and sensors, on the other hand, may have internal volumes that could be imploded under pressure, although most commercial objects will likely leak and flood, rather than wait to implode at depth.