NavList:

Howard

Did you ever try seven-shot, two-star sandwich fixes.  You only needed one assumed position initially and no moving of position lines.  You could apply your corrections for each star to the assumed position before plotting the azimuth and average intercept for each star.  Moreover, there was no ‘cocked hat’ to worry about.  All you did was divide the line between your DR Position and were the intercepts crossed in the ratio of the anticipated (laid down by your operating authority!) accuracy of your DR and your celestial and call that your Most Probable Position (MPP).  The only trouble was, even with two sextants and the whole crew involved, you got nothing on the chart until at least ten minutes after mid-time.  At 480knots that was 80nm flying.  I suppose, if you could have prised your aged Electronics Operator out of his seat to operate the second sextant simultaneously with the first, you might have reduced that time by half, but he would have claimed he was too busy doing the timing and watching his volts and his amps. DaveP