Final answer:
Airway TK502 on the Washington DC area is a helicopter RNAV route, which differentiates it from other 'T' airways.
Step-by-step explanation:
The primary difference between Airway TK502 on the Washington DC area and other 'T' airways is that it is a helicopter RNAV route. While ordinary 'T' airways are used by both fixed-wing aircraft and helicopters, TK502 is specifically designated for helicopters. This allows for more efficient navigation for helicopter operations in the area.
Airway TK502 is different from other 'T' airways because it is a helicopter RNAV route, indicated by the 'TK' prefix, serving helicopters with unique routing through busy airspace.
Airway TK502 in the Washington DC area, which runs northeastward from the EMI VOR, is different from other 'T' airways because it is a helicopter RNAV route. The prefix 'TK' on an airway name indeed indicates that it is specifically designated for helicopter use. This is unlike other airways that typically serve fixed-wing aircraft. Helicopter RNAV routes, such as TK502, take advantage of the helicopters' unique maneuvering capabilities and provide them with routes through busy airspace, often at lower altitudes, that are separate from the fixed-wing traffic patterns.It is important to note that TK routes do not require a special ATC clearance to fly them. Pilots must still follow standard procedures and obtain necessary clearances for airspace access. Additionally, TK routes are not exclusive to military use, contrary to what is mentioned in option 1.
Therefore, option 2 is the correct statement that explains the difference between Airway TK502 and other 'T' airways.