Abstract: Measuring devices and systems for determining accuracy in marksmanship of one or more shots after firing a firearm at a point of aim are described. Each of the measuring devices includes a transparent sheet configured to be overlaid on the point of aim and the one or more shots, the transparent sheet having printed thereon: a plurality of vertical lines, a plurality of horizontal lines, the plurality of vertical lines and the plurality of horizontal lines forming a grid pattern, and a point of aim alignment marking, the point of aim alignment marking being located at a center of the grid pattern.

Abstract: A tape drive having a novel capstan motor assembly for advancing and rewinding a data tape. The capstan motor assembly according to the present invention includes a motor, a gear assembly and an idler. The gear assembly has a driver gear and a driven gear for transmitting motor torque from the motor to the idler. A portion of the idler is in contact with a capstan belt wheel within the cartridge. The idler rotates the capstan belt wheel, which in turn moves the data tape past the recording area. The gear train allows the motor force to be transmitted to the capstan belt wheel without slippage between the drive roller and the idler normally occurring in conventional capstan motor assemblies.