Patent ID: 9671935
Date: 2017-06-06
CPC Classifications: B63B,G01C,G06F,G09B

Claim:
1. An information display device, comprising: a display screen configured to display, on the display screen, a nautical chart and an information display device symbol indicating a position of the information display device on the nautical chart, the information display device being arranged on a ship; a touch detector configured to detect rotating operation and pinch operation, the rotating operation being touch operation in which a position of one of a touch on the information display device symbol and a touch on other than the information display device symbol is rotated centering on a position of the other touch over a predetermined angle without changing the position of the other touch, the pinch operation being touch operation in which at least one of the two touches on the display screen is separated from or brought closer to the other touch; and a controller having a processor, the controller configured, when the touch detector detects the rotating operation, to switch a display mode to a different display mode in which a reference azimuth defining a displaying orientation of the nautical chart is different, and when the touch on the information display device symbol is detected, not to perform processing that is associated with the pinch operation even in a case where the touch detector detects the pinch operation.