What are the three SRS categories of aircraft?

• A. Category A, Category B, Category C
• B. Category S, Category L, Category H
• C. Category I, Category II, Category III
• D. Single, Twin, Multi

Answer: (C)

These categories describe the levels of radar surveillance service an aircraft can receive under Special Radar Service. There are three levels: Category I, Category II, and Category III. Each level represents a different degree of radar tracking, identification, and the associated separation criteria the controller uses or can apply. Category I is the basic level of radar service, Category II provides more precise monitoring and closer separations, and Category III offers the highest level of surveillance and tighter separation provisions suitable for more demanding traffic scenarios. Other labelings like A/B/C, S/L/H, or simply Single/Twin/Multi aren’t used for these SRS classifications, so the three recognized categories are I, II, and III.