(c) Type of aircraft and altitude if known. EXAMPLE- Traffic 8 miles south of the airport northeast-bound, (type aircraft and altitude if known). d. The examples depicted in the following figures point out the possible error in the position of this traffic when it is necessary for a pilot to apply drift correction to maintain this track. This error could also occur in the event a change in course is made at the time radar traffic information is issued. FIG 4-1-1 Induced Error in Position of Traffic WIND TRACK TRACK (A) (B) EXAMPLE- In FIG 4-1-1 traffic information would be issued to the pilot of aircraft "A" as 12 o"clock. The actual position of the traffic as seen by the pilot of aircraft "A" would be 2 o"clock. Traffic information issued to aircraft "B" would also be given as 12 o"clock, but in this case, the pilot of "B" would see the traffic at 10 o"clock. FIG 4-1-2 Induced Error in Position of Traffic TRACK WIND (D) (C) TRACK EXAMPLE- In FIG 4-1-2 traffic information would be issued to the pilot of aircraft "C" as 2 o"clock. The actual position of the traffic as seen by the pilot of aircraft "C" would be 3 o"clock. Traffic information issued to aircraft "D" would be at an 11 o"clock position. Since it is not necessary for the pilot of aircraft "D" to apply wind correction (crab) to remain on track, the actual position of the traffic issued would be correct. Since the radar controller can only observe aircraft track (course) on the radar display, traffic advisories are issued accordingly, and pilots should give due consideration to this fact when looking for reported traffic. 4-1-16. Safety Alert A safety alert will be issued to pilots of aircraft being controlled by ATC if the controller is aware the aircraft is at an altitude which, in the controller"s judgment, places the aircraft in unsafe proximity to terrain, obstructions or other aircraft. The provision of this service is contingent upon the capability of the controller to have an awareness of a situation involving unsafe proximity to terrain, obstructions and uncontrolled aircraft. The issuance of a safety alert cannot be mandated, but it can be expected on a reasonable, though intermittent basis. Once the alert is issued, it is solely the pilot"s prerogative to determine what course of action, if any, to take. This procedure is intended for use in time critical situations where aircraft safety is in question. Noncritical situations should be handled via the normal traffic alert procedures. a. Terrain or Obstruction Alert 1. Controllers will immediately issue an alert to the pilot of an aircraft under their control when they recognize that the aircraft is at an altitude which, in their judgment, may be in an unsafe proximity to Services Available to Pilots 4-1-13