The method further includes determining, in response to determining that machine retarding will be required, a desired retarding gear, and recommending {HEAD ~ the retarding gear} to {TAIL ~ the operator} 
The method further includes determining , in response to determining that machine retarding will be required , a desired retarding gear , and recommending { HEAD ~ the retarding gear } to { TAIL ~ the operator }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL