What is the maximum number of instrument approaches required within the preceding 12 months for standard rating?

For maintaining a standard instrument rating, a pilot must complete a minimum number of instrument approaches within the preceding 12 months to demonstrate proficiency and currency. The requirement specifies that pilots must have successfully executed at least 18 instrument approaches during that period. This ensures that they retain the necessary skills and familiarity with instrument flying procedures, which is crucial for safety and competency.

The specific number is established by regulatory authorities to reflect the level of practice needed to effectively navigate and operate safely under instrument flight rules. Satisfying this requirement contributes to a pilot's ability to react to changing conditions and to execute approaches accurately when flying in instrument meteorological conditions.

Other options typically do not meet the regulatory requirements; therefore, the correct answer reflects the established standard for maintaining currency in instrument flying.