The CV-4 USS Ranger was the first American carrier that was designed and built as a carrier from the start. It was felt that many smaller carriers might be better than larger carriers such as the Lexington class.
Originally the Ranger was going to have a flush deck but during construction it was felt it was better to have an island for operations. To save on weight to keep within treaty limitations the island and flight deck were built as superstructures and not as an integral part of the hull. Also to save on weight there was no underwater protection included.
It was felt that dive bombers were the better weapon so no storage facilities for torpedoes were included in the initial design. Later, during World War II, storage was added.
There were three folding funnels on each side of the Ranger. This did not work very well with air operations. THe funnels were placed horizontal when flight operations commenced.
The hangar was open to allow for aircraft to be warmed up before being brought up to the flight deck. There was a catapult installed on the hangar deck.
40 fuselages could be mounted to the roof of the hangar deck to facilitate movement around the deck.
A gallery deck was added to allow for placement of guns and personnel off of the flight deck. There were two elevators placed near the middle of the flight deck.
The cost of the Ranger was around $20 million.