Navig.
a line connecting all the possible positions of a ship or aircraft, as determined by a single observation. Abbr.: LOP Also called position line .
Navig.
a line connecting all the possible positions of a ship or aircraft, as determined by a single observation. Abbr.: LOP Also called position line .
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012