rhumb line

rhumb-line bearing

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

observer-target line (OT line)

scheme trail line (tag line)

armistice demarcation line

beyond line-of-sight (BLOS)

bulk distribution line

cease-fire line (CFL)

combat outpost line

confrontation line

contact line

contamination control line

contour line (contour)

county line

defensive belt / line

delivery line (pipeline)

demarcation line

dismount line

distant early warning line

drive line / drive (propeller) shaft

final coordination line

final protective line (FPL)

fire support coordination line (FSCL)

firing line

first-line reserve

formation in line

forming-up line

fortified line

forward front-line deployment

forward line of own troops (FLOT)

front line

front line logistic support