My saddest story was with SH3 but the same mistake can be made easy with SH4
Normally I only use the attack periscope. One time I tried using the Obs scope. Very little differences. Back to attack scope
Sneaking up on a merchant, slow speed, attack scope used only for a few seconds and lowered. Just like in school.
Merchant suddenly veers away and an escort is coming straight for me like he knows where I am.
Leveling off at depth and having time to kill while the escort is taking its time to kill me. I found out what the problem was.
I ...uh... kinda forgot to lower the observation periscope
I was so used to using the keyboard command to auto lower the attack scope that I used it instead of the command to lower the obs scope. Lowering the attack scope twice does not compensate for leaving the obs scope up
Makes it hard to sneak up on a merchant with the scope up.
Moral of the story is that ALL the scopes need to be retracted if you wants to sneak up at peri depth.