Sorry about the thread drift (unforgivable in a topic about navigation?) but it is 707 related.
Many years ago when I was in airline sales, we received a visit from a sales rep for Varig. He extolled the virtues of their 707s on the South Pacific as outperforming other airlines' 707s because the Varig aircraft "had the boosters". I never knew what he was talking about then and it still troubles me today. I had visions of JATO/RATO but I've never heard of such a thing on the 707. Does anyone know what he was on about?
Rgds