Setting Up for an Attack...Question

[Captain Hill]

I remember seeing this in one of the multitude of tutorial videos or documents I read on how to effectively use the TDC/PK (I am running a campaign in HARD mode, so I get no "help" on TDC data), but I can't seem to remember if I 'saw' it correctly or if I was imagining things. OK, here goes....

I know that sticking your periscope up in a convoy should be kept to a minimum. I remember that one of the vids showed that you'd

1. ID the ship,
2. lock (L) the scope,
3. engage the PK,
4. get an initial distance/bearing and then
5. DOWN SCOPE.

The video waited a minute or two (to allow the target to track) and then...

1. UP SCOPE to find the scope still tracking the target ship,
2. a quick second distance/bearing check, then
3. a course/speed calculation, then
4. adjust the AOB to the correct measurement,
5. quickly reconfirm distance/bearing a final time and
6. off the fish goes!

My question -- Why is it I can't get my scope to stay on the target craft after a scope-down? Should it? Did I imagine that aspect of the video?

Thanks to all who contribute here! Oh, BTW, I am running TMO 163 (with the patch) and HUD MOD for TMO 163.

Dan