The Vautour IIB bomber lacked any sort of radar arrangement or many of the contemporary navigational aids and attack systems that were installed upon several aircraft performing the same role during this era. Aiming of the armaments was performed by a bombardier, who would principally perform his bomb-aiming function using a Second World War-vintage American-built Norden bombsight. The navigator/bombardier position was within the nose section, which was glazed to provide external visibility. Both the Vautour IIB and IIA models were restricted to performing missions only under clear-weather operations during daylight. The Vautour IIN interceptor model was not as restrictive, having some capacity to conduct both nighttime and adverse weather operations, having been furnished with a radar system. During its service in Israel, where the weather of the local climate was generally favorable and daylight missions commonplace, the Vautour's lack of advanced targeting and navigation equipment was found to be not a crippling limitation. However, when operated in Europe, these restrictions were considered to be a major disadvantage. As a result, the French AdA never deployed their single-seat Vautour IIA fleet in a frontline capacity; the majority of its IIB bombers were quickly converted to the improved Vautour IIBR standard, which was used to perform photo reconnaissance missions instead. The Vautour was capable of being equipped with various armaments. In Israeli service, it was typically armed with a pair of 30 mm cannons, as well as up to four removable underwing rocket pods, containing up to 19 air-to-ground rockets each; up to 3,000lb of bombs or alternatively a maximum of 232 68 mm rockets could be accommodated internally in the bomb bay. 4,000lb of bombs could also be mounted externally. The Vautour IIB bomber could be used to carry and deploy nuclear weapons in addition to its conventional arsenal. The internal bomb bay of a single aircraft could contain either one AN-11 or one AN-22 nuclear bomb; however, in AdA service, the primary carrier of nuclear weapons would quickly be transitioned to the newer and more capable Dassault Mirage IV, which supplemented and eventually replace the Vautour IIB bomber. Operational history Originally, the AdA had intended to order a total of 440 Vautours, comprising 300 of the IIA model and 140 of the IIN variant. However, plans were modified; ultimately no Vautour IIAs would enter AdA service and around 30 were believed to be constructed, 18 of which being sold to