NavList:

The solution is really easy. Just download (for free) the complete Air Almanac for 2017 and use just the tabulations for "on the hour." You then have the exact same data you get from the Nautical Almanac. Then use the non-changing correction tables for working the sight as if you were using the Nautical Almanac. I've posted before the link where you download the Air Almanac. gl

Gary.  I was about to retire to the 'Astrovan' while the Sun was out.  With your lawyer’s memory for links, have you ever found a downloadable pdf of the 2017 USNO/UKHO Nautical Almanac as opposed to the Air Almanac, or is the USNO NA too commercially valuable? The USNO site seems slightly off air at the moment, so I can’t check on there.  Other nautical almanacs are available, but they won’t necessarily be in exactly same format as the dated tables provided in Mike’s copy of Mary Blewitt, and navigating the docs to the correct page and columnis almost as important as reading the tables correctly.  DaveP