Although now well strung out on approach to Pitești, all five groups made the navigational check point from Ploiești. At Câmpina, the 389th Bomb Group departed as planned for its separate, synchronized approach to the mission target. Continuing from Pitești, Col. Keith K. Compton and Gen. Ent made a costly navigational error. At Târgoviște, halfway to the next check point at Florești, Compton followed the incorrect railway line for his turn toward Ploiești, setting his group and Lt. Col. Addison Baker's 93rd Bomb Group on a course for Bucharest. In the process, Ent and Compton went against the advice of their airplane's navigator and the Halverson Project (HALPRO) veteran Cpt. Harold Wicklund. Now facing disaster, many crews chose to break radio silence and draw attention to the navigational error. Meanwhile, both groups had to face Gerstenberg's extensive air defenses around the Bucharest area in addition to those awaiting them around Ploiești.