Ah yes, IFS. I remember studying my “study guide” (live by the gouge) for the FAA test so thoroughly that I literally just had to read the first 3 words of the question, and I knew the answer already. Good times.
IFS is what it is. It’s been previously stated that it is a litmus test for ability to learn quickly, which is accurate. General concepts are always good to know though.
Let’s put it this way. As an IFS student, I knew the civilian VFR cloud clearance requirements for day and night. I knew the minimum equipment required for day VFR flying. a-tomato-flame, right? Do I know those things now, as a fleet (replacement) pilot? Hell no. But I sure know where to look them up at, I know I have the ability to learn them for a test, and most importantly I know not to fly into a cloud with another jet on my wing if I can help it.
I guess what I’m getting at is this- not all material is equal. The ability to sort through the firehose to the face that is the naval aviation pipeline, and break it down into Group 1 (know it cold), Group 2 (I could explain 80% of it), and Group 3 (it sounds familiar and I know where to look it up) will serve you well.