[line of sight] (1559) 1: a line from an observer's eye to a distant point
2: the straight path between a radio or television transmitting antenna and receiving antenna when unobstructed by the horizon
[line of sight] (1559) 1: a line from an observer's eye to a distant point
2: the straight path between a radio or television transmitting antenna and receiving antenna when unobstructed by the horizon
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012