The category "<line_type>" can be expressed as follows:
battle position
battle positions
boundary line
boundary lines
bp
bps
cfl
cfls
coordinated fire line
coordinated fire lines
fire support coordination line
fire support coordination lines
fscl
fscls
ld
lds
line
line of departure
line of departures
lines
lod
lods
phase line
phase lines
pl
pls
route
routes