Pooleys NM-1 Scale Rule

Pooleys Transparent NM-1 Scale Rule (24 cm)

Convenient length (240mm x 38mm) for cockpit and planning use. Outside edges respectively read 0–60nm in 1:500,000 and 0–30nm in 1:250,000.

Centre scale converts between kilometres (km) from 0–110km in 1:500,000 and statute miles (sm) from 0–70sm in 1:500,000.

Scales

- 1:250,000
- 1:500,000