difference was that the SW antennas could be directed in elevation for aircraft detection. Designated SW (Ship Warning), it was usually installed together with the SWG. Eight of each type were eventually accepted by the RNZN. A number of SWGs were also built for the British fleet stationed in Singapore; some of these with their manuals were captured by the Japanese in early 1942. After sending engineers to the Rad Lab in the United States to study their products, a project to develop mobile 10-cm (3-GHz) systems for coast-watching and surface-fire-control that might be used throughout the Pacific. With a great demand for such systems, an experimental unit was developed and tested before the end of 1942. Designated ME, the electronics was mounted in the cabin of a 10-wheel truck and a second truck carried the power generator and workshop. Equipment was built in both Christchurch and Wellington. The radar had a single parabolic antenna was on the roof, and a plan-position indicator CRT was used, the first such in New Zealand. The first of these went into service in early 1943 in support of a U.S. torpedo-boat base in the Solomon Islands. Some of the MD radars were used to replace 200-MHz CW sets, and several systems were built for operation on RNZN minesweepers. As the Allies progressed upward in the Pacific, a need arose for a long-range warning set that could be quickly set up following an invasion. The RDL took this as a project in late 1942, and in few months six Long-Range Air Warning (LWAW) systems were available. These operated at 100 MHz (3 m) and, like the microwave sets, were mounted in trucks. A single Yagi antenna was normally used, but there was also a broadside array that could be used when a more permanent operation was established. The range using the Yagi was near 150 km; this increased to over 200 km with the broadside. From the start in late 1939, 117 radar sets of all types were built in New Zealand, all by small groups; no types were ever put into serial production. After 1943, little such equipment was produced in the country, and RNZN warships were then provided with British outfits to replace the earlier New Zealand sets. Radar systems were developed from 1939; initially New Zealand made but then (because of difficulty on sourcing components) British made. Transportable GCI radar sets