I believe the obs scope had a bigger aperture for more light but more noticeable to the enemy. The tilt thing was better for looking for planes and maybe even some celestial navigation? From everything I've read there's really no periscope attacks in the dead of night in reality.

scope heights
 

On the USS Darter SS-576 our obs scope Type 8 was about 3 ft shorter then the attack scope Type 1 the Type 1 was the same as the WW II scope. The same was true on USS Drum SSN 677 and USS Los Angeles SSN 688 but the obs scope was a Type 18D/E and the attack scope was a Type 1F.:salute:

Problem is they put those big manuals in games today, cost will y high. Those days of 200 page manuals went away with 3.5 disc.

Notice today what we use to call manuals are sold as "Tip Books" in some fashion and usually cost $20.

its found in the main sh4 folder inside your support folder

one point that wasnt said is that they reused the exact same manual from sh3 and they just change a few (very few) words here and there so most of whats in it is incorrect or irrelevent to sh4. heck, a lot of it was incorrect for sh3 as well lol.

it looked like they didnt even put any effort into doing a manial for sh4 like it was something done on their lunch break because someone forgot all about it. (which is what i think happened)