Licht der Zee-vaert of Willem Blaeu

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Pictures of Linda Timmer for the Grundtvig project. By courtesy of the The Special Collections Department of the University of Amsterdam.

Pictures of Linda Timmer for the Grundtvig project. By courtesy of the The Special Collections Department of the University of Amsterdam.

Part of the map of the former “Zuyderzee”, now named “IJsselmeer”. In the cartouche is written that the description, measurement and the sound of the depths are perfectly done in this map. So sailors can trust it. This map is made byorder of the rulers of the city of Medemblik, a town at the Zuyderzee.

 

 

 

 

 

 

 

 

 

 

 

 

Pictures of Linda Timmer for the Grundtvig project. By courtesy of the The Special Collections Department of the University of Amsterdam.Map with two islands,Texel and Vlieland, in the Wadden Sea. The Wadden Sea is a body of water located between the Dutch islands and the Dutch mainland. You can see the sound of the depths.

 

 

 

 

 

 

 

Pictures of Linda Timmer for the Grundtvig project. By courtesy of the The Special Collections Department of the University of Amsterdam.First page of “Licht der Zee-vaert” (Light of Navigation)

 

 

 

 

 

Pictures of Linda Timmer for the Grundtvig project. By courtesy of the The Special Collections Department of the University of Amsterdam.

Explanation how to work with an astrolabe (left) or cross-staff (right), instruments used for measuring altitudes (navigation)

 

 

 

 

Pictures of Linda Timmer for the Grundtvig project. By courtesy of the The Special Collections Department of the University of Amsterdam.Another exampel how to measure the altitude. In this figure P is the North Pole, and G the South Pole, E H the equator, A B the Horizon, Z the Zenith and D the Sun. De gemeten hoogte van de zon is 40°(DB). The measured height of the Sun is 40 ° (DB). We have to add 20 ° (ED). The sun is 20 degrees south of the equator (it is autumn or winter). This means that one is located at 60 ° north latitude (40 ° + 20 °).

 

 

 

 

 

 

Pictures of Linda Timmer for the Grundtvig project. By courtesy of the The Special Collections Department of the University of Amsterdam.Plan by an instruction how to make a cross-staff

 

 

Pictures of Linda Timmer for the Grundtvig project. By courtesy of the The Special Collections Department of the University of Amsterdam.Another exampel how to measure the altitude

 

 

 

 

Pictures of Linda Timmer for the Grundtvig project. By courtesy of the The Special Collections Department of the University of Amsterdam.Design of an instrument to find find the hours of the night, all times of the year.You can move the handle to the right day and then look to the Pole Star.

 

 

 

 

 

 

 

 

 

Pictures of Linda Timmer for the Grundtvig project. By courtesy of the The Special Collections Department of the University of Amsterdam.Second front page of “Licht der zee-vaert” (Light of Navigation)

 

 

 

 

 

Pictures of Linda Timmer for the Grundtvig project. By courtesy of the The Special Collections Department of the University of Amsterdam.Coast side view of some towns of the province of Zeeland. For the sailors were these coast side views important, they could recognize in this way their position.

 

Pictures of Linda Timmer for the Grundtvig project. By courtesy of the The Special Collections Department of the University of Amsterdam.Coast side view of some towns of the Nothern part of the province of Holland.

 

Pictures of Linda Timmer for the Grundtvig project. By courtesy of the The Special Collections Department of the University of Amsterdam.Nautical chart of the coast of Holland

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