These are pictures that I have selected to help explain the catapult  hardware and the ship areas impacted

 

These show the ship space made available by removing the piping, valves and accumulators from the C13-2 catapult.  This is repeated 4 times for 4 catapults.

 

These are the retained launch cylinders.  The gentleman is standing on the thrust-exhaust unit to which they bolt and which is also retained.  Everything aft of the thrust-exhaust unit is removed and replaced with ICCALS hardware.  This shows the modification to the launch engine with the launch valveremoved from the aft end of the thrust-exhaustunit.

 

This is a cross-section of the Enterprise (CVAN 65) showing the catapult hardware on the gallery deck in spaces 10 and 11.  This graphic is interesting in that it shows the 4 large air compressors in the engine room (not used on ICCALS) that were to be used to support the C14 combustion catapult.  They were left in for stability weight and to avoid the cost of removing them.  The Enterprise has the best high pressure air system of any carrier in the fleet.