You are on the 265 degree radial. To intercept the 330 degree radial at a 90 degree angle, what should you set the OBS to?

When tasked with intercepting a radial at a right angle, it's essential to consider your current position relative to the navigation aid from which the radial emanates. In this situation, you are currently on the 265-degree radial and are aiming to intercept the 330-degree radial at a 90-degree angle.

To accomplish this, you first need to calculate the appropriate course to set on the Omnibearing Selector (OBS). The desired radial is 330 degrees. To intercept this radial at a right angle, you will need to establish a heading that is perpendicular to it. When you are currently on the 265-degree radial and want to move to the 330-degree radial, the difference between them is 65 degrees.

To intercept at a right angle, you would turn to a heading that is 90 degrees to your current position. In this case, turning toward 150 degrees (which is essentially 90 degrees to the left of the 240 degrees heading towards the VOR) allows for a proper intercept. Setting your OBS to 150 ensures that you are set to receive signals that lead you toward 330 when you make your turn.

Thus, by selecting 150 degrees on the OBS, you are aligning your navigation approach correctly to achieve