EntityQ919817· pop 8· linked from 90 articlessolar compassSign in to savenavigational instrumentConnectionsYouTubeConceptInternational Standard Book NumberEntityIndustrial RevolutionEntitylatitudeEntityGlobal Positioning SystemEntityEdward VIIPersonsundialEntityOhio RiverEntityJohn Frederick William HerschelEntityGreenwich Mean TimeEntityOCLC, Inc.EntityEarth's magnetic fieldEntitytheodoliteEntityHyde ParkEntityEarth's rotationEntityspirit levelEntitysurveyingEntityopen accessEntityThe Great ExhibitionEntitymagnetic declinationEntityCategoriesAmerican inventionsNavigational equipmentOrientation (geometry)