a period from noon of one day to noon of the next, used in reckoning time aboard ship.
Talk Like A Sailor: 9 Fascinating Nautical TermsIn sailing, a moonraker is a light square sail set at the top of the mast. But this term is also a demonym for people from Wiltshire, England.
Origin of nautical day
First recorded in 1865–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019