2. http://video.pbs.org/video/1481015813/

3.  The main issue the designers had to conquer was the displacement toppled the sub over because of the weight. The engineers decided to combine two subs side buy side to allow the sub to maintain buoyancy.

4. Imperial Japanese Super Sub I 400 class drawing.

6.  The drawing was made to show were and how the planes were being stored.

7.  This photo seems to show how massive the hull was to be after commissioning it also shows were the heavy armament was placed.

9.  During that era the sub was so big in order to take a picture of it the camera had to be held at an angle from a close distance.

10.  If you notice the photo seem to have been taken with other Japanese Navy ships in the back ground.

11.  DVD available on www.PBS.comwww.PBS.com

12. Imperial Japanese Super Sub I 400 class before commission.

13. 1. A video documentary was retrieved from the internet that posted with the premiere date of May 4, 2010 at: http://video.pbs.org/video/1481015813/ http://video.pbs.org/video/1481015813/ 2. Wikipedia article on the Imperial Japanese Super Sub I 400 class that gets into specific details of the commissioned Japanese Navy Submarine. Posted on the internet : http://en.wikipedia.org/wiki/Submarine#Submarines_during _the_Russo-Japanese_War http://en.wikipedia.org/wiki/Submarine#Submarines_during _the_Russo-Japanese_War