CYA Pilot Student Scale Ruler

Convenient length (42cm x 3.8cm) for flying school students. Outside edges respectively read 0–110nm in 1:500,000 and 0–220nm in 1:1,000,000. Centre scale converts between Statute Miles (sm) 0–115sm and Nautical Miles (nm) 0–100nm.

Rigid plastic (3mm thick ) material – long lifetime guaranteed !