At the back of the PDF, you will find the "Increments and Corrections" tables. This is the secret sauce. It allows you to add minutes and seconds to the hourly values without doing complex multiplication. A 1988 almanac uses the same interpolation method as a 2024 almanac.
The calendar and celestial patterns repeat closely every 28 years. While not identical due to leap year variations and orbital shifts, historical almanacs like 1988 are studied by mathematicians tracking these long-term astronomical cycles. Key Data Found in the 1988 Almanac nautical almanac 1988 pdf
: The 1988 data remains a standard teaching tool for celestial navigation courses, helping students learn how to interpolate increments for minutes and seconds without needing a brand-new yearly volume. At the back of the PDF, you will
To help point you in the right direction, let me know how you plan to use this data. If you'd like, please share: A 1988 almanac uses the same interpolation method