ADF Position fixing method involves what?

ADF Position fixing method involves what?

• A. By plotting a two-station fix
• B. By using a three-station fix
• C. By using GPS
• D. By dead reckoning

Answer: (A)

ADF position fixing uses bearings from the aircraft to known NDB stations and lines of position derived from those bearings. By obtaining bearings to two different stations and plotting the corresponding lines, the aircraft’s location is found at the intersection of those two lines. This is why a two-station fix is the standard method. Using three stations is possible, but unnecessary for a fix—the intersection of two lines already pinpoints position. GPS and dead reckoning are separate methods: GPS uses satellites for position, while dead reckoning estimates position from course, speed, and time without relying on radio bearings.

ADF position fixing uses bearings from the aircraft to known NDB stations and lines of position derived from those bearings. By obtaining bearings to two different stations and plotting the corresponding lines, the aircraft’s location is found at the intersection of those two lines. This is why a two-station fix is the standard method. Using three stations is possible, but unnecessary for a fix—the intersection of two lines already pinpoints position. GPS and dead reckoning are separate methods: GPS uses satellites for position, while dead reckoning estimates position from course, speed, and time without relying on radio bearings.