Manufactured in brass with stainless steel points, highly polished. Friction adjustment. Packed in protective PVC wallet.

Handbearing compass.

Middy Bar Parallel Rule 400mm

Sold separately or as kit with dividers

Speed-Time-Distance Calculator

• Simple to use slide rule 


• Calculates the third variable given the other two (distance covered, given speed and elapsed time)


• Outer sleeve manufactured from high impact plastic