believed the range capability for such a system would be about 1,300 nautical miles with a growth potential to 1,400. Subsequently, the length was specified for 58 feet to assure the 1,500-mile range. Plans were also becoming firm on developing other components of the missile. In the G&C section, the all- inertial system appeared to offer the best approach, but there were some problems to be considered. To achieve an accuracy of a 1,500-meter miss distance circular probable error (CEE) at full  range, fuel cutoff had to be effected within close limits. However, there were a number of these that could be resolved and proven through testing. For the Navy, investigations were in progress to determine if the SINS could be connected to the inertial guidance system. In any event, ABMA felt that a parallel program to develop radio-inertial guidance was a must to assure that there was an adequate system when the missile was operational. This could be accomplished through the coded Doppler radar command (CODQRAC) system, in which considerable development progress had already been recorded. The re-entry problem was being studied; too, and plans were made as to the methods of conducting tests. ABMA was developing a three-stage vehicle with a detachable head that would approximate conditions of the JUPITER upon re-entry. Twelve vehicles designated as composite re-entry test missiles (CRTM) were allocated to this phase of the program. The REDSTONE and a cluster of scaled-down SERGEANT motors served as the booster element. ______________________________