Cessna Citation Sovereign (C680)
Flight Crew Air Transport Pilot (ATP)
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Issued Advisory / Alert; Flight Crew Became Reoriented
In final phase of the climb to FL350 having passed the SHIPP waypoint; New York center cleared us to fly direct to the KINGG intersection. A few seconds after the aircraft had started the turn towards the intersection the New York center controller asked us if we were turning to the left; after replying affirmatively to the question he gave us an immediate turn right to a new southeasterly heading telling us again to make sure we were going direct to the KINGG intersection. We immediately realized our mistake noting that the spelling of the KINGG intersection was incorrect in the FMS. The spelling we had entered during the route planning phase was KINNG and not KINGG. The KINNG intersection is also in the New England geographical area and did not trigger a gross error in the FMS once entered. In the route verification phase the misspelled word KINNG was in the correct order on the route and did not trigger an alert in the crew because the sound of the two words is exactly the same....contributing factors were also an extremely early report for duty by both crew members and late arrival of the Captain at the aircraft; 20 minutes prior to scheduled takeoff due to heavy traffic.Suggest changing the name of either the KINGG or KINNG intersections to something completely different.
[Report Narrative Contained No Additional Information.]
C680 flight crew entered KINGG intersection instead of KINNG in the FMS route section. The names of both intersections sound the same and both are located in the New England area; approximately 200 NM apart. ATC advised the crew of the correct intersection spelling; which was then correctly entered into the FMS.