FAA Ground School Practice Test

When the VOR is tuned to the VOR-DME at Dallas-Fort Worth Airport, and the OBS is set to 253° with a TO indication and right CDI deflection, where is the aircraft positioned relative to the VOR-DME?

1. West-southwest

2. East-northeast

3. North-northwest

4. South-southeast

The correct answer is: East-northeast

To determine the aircraft's position relative to the VOR-DME at Dallas-Fort Worth Airport, let's break down the information provided. The VOR is tuned to the VOR-DME, the OBS (Omni Bearing Selector) is set to 253°, and there is a TO indication along with a right CDI (Course Deviation Indicator) deflection. The OBS setting of 253° indicates the course that the pilot desires to track from the VOR station. A TO indication means the aircraft is heading toward the VOR station, which suggests that the pilot is flying along the desired course toward the VOR at 253°. If there is a right deflection on the CDI, it indicates that the aircraft is to the left of the desired course. Therefore, to get back on course, the pilot would need to maneuver the aircraft to the right. To visualize this, consider the radial indicated by the VOR. The 253° radial from the VOR station extends outward from the station in a generally west-southwest direction. Since the display shows a right deviation, the aircraft must be positioned to the left of this radial, meaning it will be somewhat north or northeast relative to it. Since the 253° radial is close