00505nam a22001817a 4500 12781 12781 250529b 2023 ||||| |||| 00| 0 eng d 9781849270915 623.89 FRO Frost, A. Practical navigation for officers of the watch 2nd ed. Glasgow Brown, Son & Ferguson, Ltd. 2023 vii, 360p. Radar navigation The Celestial Sphere and the Nautical Almanac Time BK 0 0 ddc 0 623_890000000000000_FRO 0 REF 16045 MU MU GEN 2025-05-29 623.89 FRO MPC6954 2025-05-29 BK Column - 4