WHistory of navigationWAmbrose Channel pilot cableWNathaniel BowditchWHistory of the compassWIberian nautical sciences, 1400–1600WHistory of longitudeWLongitude (book)WLongitude ActWLongitude rewardsWPedro de MedinaWMemorias históricas (Capmany)WMicronesian navigationWPeriplusWPeriplus of Pseudo-ScylaxWPeriplus of the Euxine SeaWPolynesian navigationWShen KuoWWilliam Spencer (navigational instrument maker)WSubmarine signalsWSunstone (medieval)WUunartoq Disc