In a no wind situation, what should you do to intercept the 180 radial inbound based on Fig 7?

Intercepting a radial involves understanding your current position relative to the desired course. In a no wind situation, you can make precise adjustments based on your heading and the radial you'll be following.

When you want to intercept the 180 radial inbound, you need to turn towards the radial in such a way that your aircraft's heading brings you onto that radial. This typically means you would need to establish a heading that aligns with an interception angle that allows you to cross onto the radial.

Choosing a right turn to a heading of 300 provides a suitable angle off the radial to intercept correctly. This choice accounts for the typical intercept angle of around 30 degrees to ensure you engage the radial effectively without overshooting it. By turning right to 300, you place yourself in a trajectory that will lead you onto the 180 degree radial from the proper angle.

In contrast, turning left or continuing on your current heading would either move you further away from the radial or keep you perpendicular to its path, which would not facilitate an effective interception for proceeding inbound. Thus, choosing to turn to heading 300 aligns you effectively for the interception and ensures a smooth transition onto the intended radial.