Polar plot of direction and distance. Displays all targets within a specific sector. Displays all targets along pencil beam for selected range limits. Displays tracking gate. Usually raw video.
Some modern radars have raw video a-scopes as an adjunct to synthetic video displays.
Must be used with a separate azimuth and elevation display of some sort. Displays targets within selected limits. Displays tracking gate. May be raw or synthetic video. Surface radars usually have two.