Dougie,
another illuminating post. As I said my contact with the snatch was on some of the JATE trials. Do you recall the Lyneham snatch demo ? A little lower and slower than usual approach almost achieved the angling catch of the year. The hook is reputed to have just missed the Jet garage that resided just outside of the Lyneham perimeter !
Another pic of the snatch which shows the rig a bit better than the previous pic.