 The 139th received F-94B Starfires, however the F-94 required a two-man aircrew a pilot and an air observer to operate its radar equipment.Trainees for the radar assignment had to attend regular Air Force Training Schools, and required virtually the same qualifications as the pilot trainees.The additional recruitment of guardsmen led to the units having a manning and capabilities problem that lasted for some time until the unit was returned to full readiness.