To intercept the DME arc after being on the 245-degree radial of the Gulfport VORTAC, what should you do first?

To intercept the DME arc after being on the 245-degree radial of the Gulfport VORTAC, it is necessary to initiate a left turn at the appropriate distance from the VORTAC, which in this case is 12.5 DME.

When flying a DME arc, the goal is to maintain a constant distance from the VORTAC while maneuvering around it. Starting from the 245-degree radial, turning left allows you to begin aligning your aircraft with the desired arc, which generally requires a decrease in radial heading to establish a path that will lead you onto the arc. By making a left turn at 12.5 DME, you create a trajectory that allows for a smoother transition onto the arc rather than having to adjust later.

The other options involve maneuvers that do not properly fit the standard procedure for intercepting a DME arc from that radial. Beginning a right turn would increase the radial number, which can complicate the arrival to the arc. Rolling out on a heading of 360 degrees does not contribute to establishing a track towards the required DME arc. Lastly, increasing altitude to 12 DME is not relevant to executing the turn onto the arc, as altitude adjustments do not directly affect