191771 ⎘
Hand manipulated computing devices characterised by a specific application for air navigation or sea navigation
Slide rule style flight computer
#2Star navigation tool and system
#3T-plotter: tool for plotting celestial lines of position
#4Air Navigation Computer
#5Navigational planning and display method for the sailor's dilemma when heading upwind
#6Holding Pattern Entry Template
#7Aeronautical navigation plotting instrument