PC-12
Flight Crew Air Transport Pilot (ATP)
Situational Awareness
ATC Issue All Types; Conflict Airborne Conflict; Deviation - Altitude Excursion From Assigned Altitude; Deviation - Track / Heading All Types
Flight Crew Took Evasive Action
Aircraft; Human Factors; Procedure
While descending into MVY Boston Approach issued a traffic advisory at 11 o'clock and climbing; and issued a turn to heading of 150. Upon rolling out on the heading of 150 traffic was sighted directly in front of the aircraft and climbing. At that point the TCAS traffic alert went off and we immediately initiated a left turning climb to avoid climbing traffic converging on our altitude and 1/2 SM or less away. As soon as we initiated our maneuver Boston also issued an immediate climb and turn to the left to avoid traffic. Estimated vertical separation was 250 ft feet and horizontal separation was 1;400 feet. Conflicting traffic maintained course and speed throughout the duration of this event. After the flight passengers inquired as to the reason for the abrupt maneuver and the (small airplane that was really close).
PC-12 pilot reported coming close to another aircraft while descending into an airport.