1693-1776 astronomicalclock astronomicalclocks ballast(ships) ballastwater biografi biographie biography boatsandboating chronometer chronometers chronomètre clockandwatchmakers clocksandwatchmakers control dischargeofballastwater ecologischeaspecten employees environmentalaspects exoticmarineorganisms geografischelengte geografischelänge geography gmt greatbritain harrison harrisontimekeepers havens histoire history horlogemakers horology identiteit islamieten islamitischewereld john kendalltimekeepers kennisoverdracht largetypebooks lawandlegislation literatureinitalian longitude longnowmanualforcivilization lunardistancemethod lunartables marinebiologicalinvasions measurement messung middleeast muslims naval navigasjon navigatie navigation nonfiction prevention research royalsociety schepen schiffschronometer science seapower shipbuildingindustry ships socialconditions socialeaspecten sterrenkunde trainingof waterhuishouding zeemacht