On dedicated night astro sorties and competitions we carried 2 peri-sextants. The normal fix was an AABBBAA sequence which would tak eone minute per shot with one minute intervals. This meant an astro sequence would take 13 minutes with the fix time some 6 1/2 minutes before the end of the sequence.
I attempts to get the ultimate accuracy some crews would shoot on an ABABABA sequence with the a star on the port and another on the starboard. The nav rad would then hop from one side to the other taking the shots in sequence. On some crews the AEO would wind the port side sextant and even take some of the shots.