Navigators in rally car races spend a lot of time with their face buried in a 'sick bag". Their job entails calling the road ahead using maps and other driving aids so the driver can have the car set up for each obstacle and spend most of the rally race head down pouring over the maps/route notes.
The big problems occur when a major "call" is missed. My cousin ended up parked 32' up in a tree because of a missed call on a yump that they hit doing about twice the recommended speed.

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