Nasa Target Speed and Distance Log Instrument  Ref: Nasatog
	Technical Specifications ~ Speed range 0-30 knots in 0.1 knot increments ~ Trip distance (re-settable) to 999nm ~ Total distance (non-volatile memory) to 999nm ~ Large display back-lit for night use ~ Proven paddle wheel sensor ~ Consumption, 10mA, + 10mA display illumination ~ Compact size only 132 x 98 x 30mm ~ Simple operation, 3 keys, 3 functions ~ Easily calibrated