Various helicopters take off and land from the Belleau Wood. Up to 30 helicopters are on deck along with various other landing crafts maintained below deck. The LCU are large landing vessels along with LCAC's. This ship is absolutely huge - flight deck is 4.5 acres. Dr. Ludwig marveled at how safety was maintained despite the work conditions.
People become complacent, however, and that is when the accidents occur.
Rules for appropriate behavior on the flight deck were closely enforced. 400 people can be on the flight deck at any given time. Numerous jets and helicopters take off from the flight deck. X. Dr. Ludwig did a lot of surgery on the USS Nimitz. There are up to 6000 people onboard an aircraft carrier.