Corrected entry: When Dodge looks through the periscope it shows a plane heading towards the "periscope" and the shot follows the plane. There's no way a periscope could get that kind of shot. The periscope is made to look at the surface of the water, not follow aircraft.
poehitman
30th Jun 2010
Correction: Submarine periscopes can elevate to look at planes and helicopters. In fact it's practice to look for any when at periscope depth.