clamps or aimers each including a tip and base aimers are attached to the first and second skeletal bodies and are connected to an articulated linkage the angular motion of the articulated linkages determines and correlates the movement between first and second aimers attached to the skeletal bodies the signal produced by the articulated linkage is translated into a measurement of distance between the tips of the first and second skeletal bodies application_number US 46118090 A description various aspects of the present invention will evolve from the following detailed description of the preferred embodiments thereof which must be compared to the prior described drawings the invention as a whole as shown in the drawings by reference character 10 the apparatus 10 is employed to measure the distance between fixation points on skeletal structures such as femur 12 and tibia 14 shown in fig7 apparatus 10 includes aimers clamps or fixation bodies 16 and 18 as elements thereof aimers 16 and 18 include means 20 and 22 for attaching the same to skeletal bodies 12 and 14 it should be noted that means 20 and 22 may take many forms including simple manual holding in addition fixation bodies 16 and 18 may also be formed differently than the embodiments.