- SabotYes, the little tick marks were there. I know the old tankers said that the string method used to be the way of bore sighting. All I'm saying is that for the last 20+, the Pye-Watson or boresight device now in use is the standard.
It's all I've ever used on M48A5, M1IP, M60A3TTS, M1A1, M1A2. I am confident that If I needed too, I could boresight a tank using string and a pair of binos though. It would take me longer and may not be as accurate as if I did it with a Pye-Watson.
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