At close quarters and Close at hand

Close at hand and at close quarters are semantically related in within reach topic. In some cases you can use "Close at hand" instead the phrase "At close quarters" as an adverb or an adjective.

Close at hand adjective - Close in space; within reach.

At close quarters and close at hand are semantically related in within reach topic. You can use "At close quarters" instead the phrase "Close at hand" as an adverb or an adjective, if it concerns topics such as close by physically.