What direction do you turn when cleared to arc east on the 15 DME arc from the 350° radial?

When cleared to arc east on the 15 DME arc from the 350° radial, the appropriate action is to perform a left turn. Understanding how arcing works is key here; the DME arc is a specific distance from a navigational aid, in this case, 15 nautical miles from a VOR (VHF Omnidirectional Range).

When the instruction is to arc east, it requires the aircraft to maintain that consistent distance from the VOR while moving around it. Given the directional information provided by the radial—350°, which is northwest—the movement to the east is achieved by turning left. This maneuver allows the aircraft to maintain the correct distance from the VOR while changing direction, as the eastward path necessitates a shift from a northwest heading to an easterly one.

Thus, turning left aligns with the requirement to transit to the east while correctly navigating the 15 DME arc.