infrared sight-line control (ISC)

infrared weapon sight

deployment line; line of deployment (LD); line of departure

far-infrared line scanner

front sight (fore / muzzle sight)

sight, to take a (careful) sight

day-sight (day sight)

modular integrated display and sight helmet (Modular Integrated Display-And-Sight Helmet)

beyond line-of-sight (BLOS)

line of sight (missile)

non-line-of sight (NLOS)

align sight line

reciprocal sight line

sight line

sight line autopilot (SLAP)

sight line spin

target sight line

manual command to line of sight (MCLOS)

dependent line of sight

final line of sight

semiautomatic command to line-of-sight (SACLOS)

semiautomatic command-to-line-of-sight missile

line-of-sight radar

line-of-sight radio-relay system

beyond radio line of sight

electronic countermeasure-resistant digital line-of-sight radio

line-of-sight microwave radio relay system

line-of-sight radio relay link

radio line of sight

radio-optical line of sight

line-of-sight angle in elevation

non-line of sight environment

visual line of sight command guidance