Vol 1 - Latitudes 0° - 15°, Inclusive. The Sight Reduction Tables for Marine Navigation (Pub 229) is published in six volumes, each of which contains two-eight degree zones of latitude with a one-degree overlap between volumes. They are designed to facilitate the practice of celestial navigation at sea. The tables are primarily used with the intercept method of sight reduction by entering arguments of latitude, declination, and local hour angle and obtaining tabulated altitudes and azimuth anglesVol 2 - Latitudes 15° - 30°, InclusiveVol 3 - Latitudes 30°- 45°, InclusiveVol 4 - Latitudes 45° - 60°, InclusiveVol 5 - Latitudes 60° - 75°, InclusiveVol 6 - Latitudes 75° - 90°, Inclusive