Hi,

regarding the height of the periscope over the conning tower:
[uboatarchive.net] - see page 2: Paragraph Overview (ship construction).

There is also described the hydraulic system, which operates periscopes.
Here: [uboatarchive.net]
you have the diagram of the hydraulic installation.

Generally, both periscopes were raised and lowered hydraulically (in case of damage - manually), additionally, the attack scope was turned by means of the hydraulic motor.

For the details of connection with fire control system, look here:
[tvre.org]

--
Regards
Maciek


[www.tvre.org]