IFR Study Guide 42 Exam Questions And Answers

How many degrees of deviation does each dot represent? What angular deviation from a VOR course is represented by half-scale deflection of the CDI? (IFH 9-11) - ️️Each dot represents 2° of deviation. Half scale deflection is 5° off course. To minimize slant-range error for DME, how far from the facility should you be and at what altitude? (IFH 9-19) - ️️This error will be minimized if the aircraft is at least 1 mile away from the station for every 1000' of altitude. What is RAIM? (AIM 1-1-17) - ️️The purpose is to determine the accuracy or "integrity" of the GPS signal. It does this by comparing the signals from the 5 satellites. If there is a discrepancy RAIM gives you an alert that the signal may not be reliable. -There are 2 error messages you can potentially receive: 1. A discrepancy or potential error has been detected 2. There are not enough satellites in view to give you RAIM What is FDE? (AIM 1-1-17) - ️️Fault Detection and Exclusion RAIM detects an error but does nothing about it except give you a warning. FDE is a function of some RAIM capable GPS. It requires 6 satellites so that info from the faulty satellite can be excluded. What is WAAS? (AIM 1-1-18) (IFH 9-32) - ️️Wide Area Augmentation System Enhances the GPS integrity and availability by: Incorporating wide-area ground reference stations to monitor the signal from the GPSsatellites