Abstract: An electronic navigation calculator having first input key group for navigation functions, second input key group for navigation numerals, third input key group for navigation operations, a memory device supplied with information signals from said first, second and third input key groups and memorizing said supplied information signals, operational and control device for carrying out predetermined navigation calculations in accordance with information signals from said input key groups, and output device for indicating the calculated results. As a result, a calculation of direction, speed, position and time of a moving body is carried out in accordance with said information signals from said first, second and third input key groups and the calculation result is displayed.