Hi Guys,

Wasn't sure of the best place to post this.

One of the model answers in my IREX Exam Prep course review appears to be incorrect. I got the answer wrong and when reviewing my workings figured out where I went wrong. There is nothing wrong with the question and answers, however the correct/model answer in the review has a couple of errata.

The question is:

You are tracking from Grafton to Casino in IMC. The Casino NDB is unserviceable. ADF 1 is tuned to Grafton and ADF 2 is tuned to Lismore. You have maintained the direct track from Grafton to Casino by allowing for 6 degrees of left drift.
The ADF indication which would confirm that you are over Casino is:

In the model answer I noticed two problems.

1) It says: "When you are over Casino, the track from Lismore is 234." As I see it on ERC L3, the track from Lismore is 243. Currently the equation below it doesn't compute. It should read 355 = -112 -243.

2) The picture drawn shows the aircraft over Lismore instead of over Casino.

Cheers.