Tell #time at #night during the Golden Age of #Piracy?

Of course, just consult your #nocturnal #star dial.

You'll also need to find #Polaris & #UrsaMajor or #UrsaMinor.

#celestialnavigation #talklikeapirate #timekeeping #stargazing #instrumentation #astronomy #histsci #constellations #science #sailing

photograph of standard wooden nocturnal for use with Ursa Major and Ursa Minor, c. 17th century. Courtesy National Maritime Museum, Greenwich, London (CC-BY-NC-ND)