I was at 1ANS in 1961 and I must say I don't remember that we had Green Satin to play with (though I knew what it was and how it worked) on the Varsity, and as you say Yellow Sun Decca came in much later. My somewhat elderly memory tells me I had a drift sight, bubble sextant, ADF (either a GEC model or the much better Marconi) and an API plus GEE mk 2 or 3. Plus a Siggie who could count the dots/dashes on Consul a damn sight easier than us u/t navs. Great days.
