Can you tune COM 1 and NAV 1 from RTU 2?

The ability to tune COM 1 and NAV 1 from RTU 2 is indeed facilitated by pressing the 1/2 button on the RTU 2. This feature allows pilots to select which Radio Tuning Unit (RTU) they wish to use for tuning communications and navigation radios. By pressing the appropriate button, the pilot can effectively toggle control between the two RTUs, granting access to input frequency settings without needing to switch to the primary unit.

This functionality is vital during flight operations, as it enhances situational awareness and allows for more streamlined management of the aircraft's communications and navigation systems. Thus, the correct choice highlights this operational capability, reflecting the design of the avionics systems that prioritize flexibility and efficiency for the crew.