Lath optical 9 in. Rangefinder sight mki

[Colin Alford]

Hi David,

I managed to get my hands on the 3.2" Rocket Launcher Manual and there is lots of detail on the Range Finder Sight (a complicated device to test and adjust), and your Optical Lath that is used in conjunction with the Range Finder Sight.

Your Optical Lath was designed for 2 functions. When it is attached to the front of the Range Finder Sight it is used to test and then adjust the mechanism of the sight to ensure that it provides the correct range readings to targets. In this mode the sight does not need to be attached to the launcher. The second function is as a bore sight. When used as a bore sight the Optical Lath is attached to the bore adaptor and inserted in the muzzle of the launcher. This assembly then sits at an angle to the Range Finder sight so that the right window of the optical lath is in front of the right lens of the sight to provide a means for zeroing the sight.

I will post pictures tonight (as the function will be much easier to understand with some pictures). I don't know the service history of the 3.2" Rocket launcher but I get the impression that it may have been short lived in the 1950s.

Peter,

I don't recall the sights that Don found as it was likely before my time.

Regards,
Colin