At what altitude would you intercept the glideslope on an approach plate?

The correct answer is that intercepting the glideslope is plate dependent. This means that the specific altitude at which you will intercept the glideslope can vary based on the particular approach procedure being followed as outlined on the approach plate. Different airports and approaches may have different requirements or characteristics that define the proper intercept altitude. This can include things like terrain considerations, obstacles in the area, and the design of the approach itself.

For instance, some approach plates may specify a certain altitude for glideslope interception that is higher or lower than what might be specified on another plate for a different runway or approach. Thus, pilots must always refer to the relevant approach plate for the specifics of the procedure they are executing, ensuring they follow the required guidelines and altitudes related to the glideslope interception.

In contrast, the other options present more rigid interpretations of intercept altitude, which do not account for the variable nature of aviation approaches based on specific flight procedures.