to obtain additional AN/ARW-18 drone control transmitter units. The existing tranemitterswere those which had been used during and none had been procured since that date. Operation CROSSROADS It was thought that the Navy might have some comparable equipmebt that could be provided for this we if found necessary. Investiga- tion revealed that the Navy AN/ARW-2 equipment might be successfully used as a subetitute and two sets were obtained and shipped to the First ~erimental Guided Missiles Group, Eglin Field, Florida, for test, It was later determined, however, that the AN/AlU&2 equipment was in critical short supply zuxicould not be provided in a ~antity sufficient to replace the AN/ARW-18. Colonel Hatch - Lieutenant Colonel Smith departed Washington on 25 November 19L7 for a tour of inspection in the forward area. After a brief stay in Oahu these officers arrived at Kniwetok on 10 December 1947 ati made an inspection of all the islands of the atoll which were to be used in the course of the operation. Thereafter these officers remiered assistance to the advance signal detachment under Major &orge Rogere ad the MCS detachcmt under Lieutenant Krouth (later Captain Heaviside). These detachsmnts had arrived from Oahu in the last week in Novenber and were making good progress. All buildings had to be recoditiomd and several of ttme were in rather poor condition. All of the transmitting antennas were being set up at the north tip of the island and all the receiving antennas were being set up at the south end of the isl.ati. As had been 120 Seotion XI