Originally Posted by FireGodHamster
Thanks for the answers.
So it could be common that the tanks sights became unusable after deflecting hits?
How long time would it take for the crew to adjust the sight again?
Short of an almost direct hit on the sight housing the amount that a gun sight may be knocked 'out of true' is slight. That being said, even a slight variation will effect accuracy until the gunner sees something is off and adjusts after watching his 'fall of shot'.
In my days in Canadian tanks instructors would deliberately take a gun sight off centre and then watch to see how the gunners adjusted. It doesn't take much once you know how to use the BAM (battle aiming marks).
To get a gun back into basic alignment doesn't take long. An open breech and some string is all that is needed.
- You unlock the x and y axis togs and cross the barrel centre with the string
- point the gun at a target a few hundred meters away by looking down the barrel and through the '+' made by the string
- center the gun sight on the same aiming point.
- lock the x and y axis togs
- swing the turret and gun away from the target 20-30 degrees.
- swing the gun back onto the aiming point.
- centre the gun on the aiming point (down the barrel again)
- adjust the x and y axis again
- repeat a couple more time
Not something you do in combat but it can be done in 10 minutes once out of the line. If the squadron B echelon is nearby one of the RCEME lads can probably check for more serious damage. Later on a few test rounds to check the setting can be done and more fine adjustments made.
Of course a direct hit on the sight or its housing may shatter the glass in which case the sight is useless.