The user could also indicate a target position on a touch panel that displays a map of the surroundings.
In baseball, certain positions are referred to as "target" positions because other players throw to them.
Thus, fragments can be very accurately positioned into the target position, predetermined by surgical simulation.
In particular the "range recorder" was a major step that provided a memory of target position.
The resulting target positions are always relative to the location of the baseline transducers.
Pilots have to see them to guide the missiles to a hit, they say, or target positions have to be precisely known in advance.
The target position is loaded into a downcounter, which keeps a tally of the steps executed.
In this example the distance travelled is fixed, but the program could allow the target position to be loaded before the travel commenced.
A further sequence of delays is used to decelerate the motor as it approaches the target position.
At the beginning of the operation the target position is loaded into the downcounter.