Which of the following aircraft is capable of flying straight up?

The SH-60 Seahawk is a versatile helicopter that is specifically designed for various missions, including anti-submarine warfare, search and rescue, and utility tasks. One of its notable capabilities is its ability to perform vertical takeoffs and landings (VTOL). This characteristic allows the Seahawk to ascend straight up into the air without needing a runway, which is essential for operations on naval vessels such as aircraft carriers and destroyers. The design and rotor system of the SH-60 enable this vertical flight capability, making it suitable for its intended operational scenarios.

In contrast, the other aircraft listed do not possess the same VTOL capability. The RQ-2A Pioneer is a tactical unmanned aerial vehicle (UAV) designed primarily for reconnaissance and intelligence gathering, and it operates more like a traditional fixed-wing aircraft where it requires a runway for takeoff and landing. The TH-57 Sea Ranger is a training helicopter that, while it can perform conventional takeoffs and landings, is not specifically recognized for the ability to fly straight up in the same manner as the Seahawk. Thus, the SH-60 Seahawk stands out as the only option capable of direct vertical flight among the choices provided.