Shame its too late to bring back Oscar-Charlie too!
Yes, and it's a shame we don't have any spitfires for the Afghanistan conflict.
If you think a "call sign" is all you need to conduct SAR then please stay off this website, unless you have something remotely sensible to post.
SAR in Shetland has been conducted by some very fine people over the years, it just so happened to predominately be with an airframe registered as G-BDOC.
I think you will find "OC" has been at SUM since 2007, in the guise of an S92 ! G-CGOC. Perhaps the "new" SUM machine will also be "OC" in another form.
One thing for sure it is " unlikely" to be a 45 year old S61.
P.