In the 60s the navigator was the hard working one on long haul. In Qantas we were lucky enough to have a superb lot, apart from the chief nav who would pass up heading chits with half degree alterations but still got bounced twice going into Honolulu as he was so far off track.
It was astro all the way,and, as so many of our routes were along the ITCZ ,there would often be long periods without a star in sight. Tahiti-Acapulco was night both ways.
The toughest route for the navs was an Electra service Perth Cocos Mauritius Joburg all at much lower levels than the 707 so even less chance of a shot.