NM-1 (240mm)

Convenient length (240 mm x 38 mm) for use in the cockpit. The outer edges shall be read as follows: 0-60 nm on a scale of 1: 500 000 and 0-30 nm on a scale of 1: 250 000. The middle scale converts between kilometers (0) from 0-110 km on a scale of 1: 500,000 and statutory miles (sm) from 0-70сs on a scale of 1: 500,000.