Which action should be taken to intercept the 060 radial at a 45° angle inbound according to illustration 3?

To intercept the 060 radial at a 45° angle inbound, the appropriate action would be to turn 90° right. This maneuver positions the aircraft correctly to intercept the radial at the desired angle.

When intercepting a radial from a VOR (VHF Omnidirectional Range), achieving a 45° intercept angle means you want to align your aircraft's flight path towards the radial effectively. Turning 90° right will align your heading such that, as you proceed along this new track and approach the radial, you'll naturally veer onto the 060 radial. The 45° angle is ideal because it allows for a smooth and efficient interception.

Choosing to turn 45° left, maintain the current heading, or turn 45° right would not provide the correct alignment to effectively intercept the 060 radial. Turning left or right at a smaller angle than 90° would not direct the flight path towards the correct intercept angle, and maintaining the current heading would only prolong the intercept, making it less efficient and potentially leading to navigational errors.