Can an aged former 'Fairy' ask a question here?
During my time on 214 Sqdn, Feb 59 to Oct 62, we were doing trials with a Rebecca/Eureka Mk X system. The Eureka X transponder was in the tanker and the Rebecca X in the receiver. This worked on a frequency of about 1,000 MHz and was to assist receivers to find the tankers.
Working at 4 times the frequency of the regular Rebecca IV and DME, it had a much shorter minimum range.
When I left 214, the trials were still ongoing. Did anything operational ever come from it?