visual line of sight (VLOS)

visual line of sight command guidance

Beyond Visual Line of Sight (BVLOS)

extended visual line of sight (EVLOS)

beyond visual range / beyond-visual-range (BVR)

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

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

infrared sight-line control (ISC)

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