Pilot's and Flight Engineer's Notes Short Sunderland III, 2nd Ed, AP1566C-PN CF-100 The Type A-8 was a

The Type A-8 was a navigation stopwatch designed for timing ground speed meters for determining the velocity of aircraft relative to the ground

likely used by the US military during the 1940-50s: AC 0-30 Volts

the transmitter frequency will have changed

Most notably

typically with radio command sets SCR-274 and SCR-522

Pilot's and Flight Engineer's Notes Short Sunderland III, 2nd Ed, AP1566C-PN CF-100 The Type A-8 was aThis is a post WWII Air Data Publications reprint of the November 1943 Air Ministry Publication. Includes checklist, airplane handling, emergencies, foldouts of cockpit pictures and instrument panel. This ~50 page black and white manual is in very good condition. Measures 7. 5 inches long and 5 inches wide.