How level bombing was done with Pe-2 and Tu-2?

[RB]

Hi guys! I'm happy I finally got through the registration (I don't understand more than a couple of words in Russian).

I'd like to ask you about the way level bombing was done with Pe-2 and Tu-2 since they do not seem to have bombsights installed <- I don't know if this is true, but I could not found any trace of a bombsight used for level bombing in any of they pictures I have with Pe-2 and Tu-2.

I found on airwar.ru this manual for Tu-2:

http://www.airwar.ru/other/bibl/tu2man.zip

Unfortunatelly I don't understand much (beside some operating limits). I saw the pages for dive bombing, but I'm more interested in level bombing. Was it possible to do level bombing beside from a small altitude (smaller than 800m) in those 2 planes? Maybe someone can help me with some explanations by translating the essential from the pages Tu2_Image79 to Tu2_Image87 in the above .zip archive.

Thank you

(Tu2-image87) As far as I see they use bomb sight PBP-1 . POH however doesn't explane how to use this bomb sight in level bombing alough it mentions balistic tables for this type of bombing from altitude 50-800 meters.