Which instrument is included in the IFR required equipment categorized under "ATOMATO FLAMES"?

The correct choice is the clock, as it is included in the IFR required equipment categorized under "ATOMATO FLAMES." This acronym serves as a mnemonic to remember the essential instruments and equipment necessary for aircraft operations under Instrument Flight Rules.

The letters in "ATOMATO FLAMES" stand for:

• A: Anticollision light system

• T: Tachometer

• O: Oil pressure gauge

• M: Manifold pressure gauge

• A: Altimeter

• T: Temperature gauge

• O: Oil temperature gauge

• F: Fuel gauge

• L: Landing gear position indicator (if applicable)

• A: Airspeed indicator

• M: Magnetic direction indicator (compass)

• E: Emergency locator transmitter (ELT)

• S: Safety belts

A clock is specifically required to ensure that pilots can measure time accurately during their flights, which is essential for navigation and adhering to air traffic control instructions. In IFR conditions, where visual cues are limited, having a reliable timing instrument aids in maintaining situational awareness and managing flight operations effectively.

Other options mentioned, such as a Rate of Turn Indicator, Ball (which refers to the inclinometer), and Fuel Gauge, while important for various flight operations, are