Several works share this name, causing confusion:
: It could range from a:
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Christian Orthodox Calendar
Nautical Calculators - Nories ABC & True Azimuths at Rising and Setting (ver. 03.8)
ETA & Bunker Calculator (ver. 08.4)
Magnetic Compass Adjustment (ver. 02.5)
ASTM & Cargo Calculators (ver. 02.2)
Paint Consumption and Areas Calculators (ver. 07.4)