Appendix A: Equipment glossary (continued)
Equipment | Description |
|
| R-T | Radio Transmitter | |
| Rx | Abbreviation for receiver | |
| Thorneycroft | Another large RAF transport vehicle complementing the Crossley | |
| TRE | Telecommunications Research Establishment (The body responsible for Radar development for the RAF). | NB Article |
| Tx | Abbreviation for transmitter | |
| Type 11 | Mobile sets as possible standbys, should the 1.5m CHL/GCI radars be jammed. 50cm wavelength, as used by Germany, reduced risk of jamming. | NB Article |
| Type 13 | Height-find radar which only gave information about the height of a particular aircraft as required. 10cm “nodding” height finder. Tx and Rx of Naval type 277 | NB Article NB Diary |
| Type 14 | 10cm surveillance radar. Similar electronics to type 13. | NB Article NB Diary NH Article |
| Type 15 | Main GCI Radar from which the bomber and intercepting fighter would be controlled from the ground GCI radar. Mobile version of Type 7. Usually consisting of aerial transmitter, 2 diesel generators, crane, R-T, jeep and 4 Crossleys | NB Article |
| Type 15 GCI Convoy | Consisted of a number of vehicles. The aerial was used for both transmitting and receiving and the primary radar of the convoy. Two diesels were on separate lorries to provide main and standby power on whatever remote site was required. These units were self sufficient out in the field and a crane would have been needed for repairs. The RT was in the back of a lorry and used for directing aircraft toward hostile bombers, which was the role of these units. The jeep would have been used by officers for surveying future sites, reporting to HQ. The Crossleys were used for transporting men and equipment. | |
| Type 21 | Five vehicle GCI convoy comprising Types 13 and 14, control centre and two diesel generators. | NB Article |
| Type 25 | The designation given to equipment consisting of types 11, 13, 14 and 15, i.e. the types of radar used by a mobile GCI convoy. | NB Article |
| Thunderbolt | US Fighter Bomber | NB Diary |