For all your questions, big or small, IDNLearn.com has the answers you need. Discover prompt and accurate responses from our experts, ensuring you get the information you need quickly.

(Refer to Figure 161 and Legend 27.) Using a ground speed of 90 knots on the ILS final approach course, what rate of descent should be used as a reference to maintain the ILS glide slope? 415 feet per minute. 478 feet per minute. 555 feet per minute.