Which aircraft is designated as the all-purpose utility transport known as the Beaver?

The U-6A Beaver is recognized as the all-purpose utility transport aircraft. Originally developed in the 1940s, it has a versatile design that allows it to be used in various roles, including cargo transport, medical evacuation, and passenger transport. Its short takeoff and landing (STOL) capabilities enable it to operate in confined spaces, making it especially useful for operations in challenging environments. This adaptability and utility have cemented its reputation among military and civilian operators alike.

The other aircraft listed serve very different purposes: the T-45A is a trainer jet primarily used for naval flight training, the AH-1Z is an attack helicopter designed for combat operations, and the CH-53D is a heavy-lift helicopter primarily used for troop and equipment transport in a more specialized context. Each of these serves distinct missions, which is why they do not fit the description of an all-purpose utility transport like the U-6A Beaver.