First of all, absolutely fantastic mod! I was posting initially regarding what I thought could have been faulty periscope tick marks but the problem was self correcting when I discovered I was incorrectly classifying the target ship during tests.
I went back to SH3 + GWX + mods recently when I found myself spending more time trying to fix SH5 glitches even with the latest supermods then playing the game!
Keep up the good work!