The raised position is for situations in which {HEAD ~ the trailer} must be manoeuvred over ramps, {TAIL ~ uneven terrain}, etc. which might contact the underside of or otherwise interfere with the fairing 
manoeuvred over
The raised position is for situations in which { HEAD ~ the trailer } must be manoeuvred over ramps , { TAIL ~ uneven terrain } , etc . which might contact the underside of or otherwise interfere with the fairing
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH