Frederik Kaiser en zijn pogingen tot hervorming van ‘het sterrekundig deel van onze zeevaart’

Frederik Kaiser and his efforts to reform the 'astronomical part of our navigation' From 1858 until his death in 1872 the Leyden astronomer Frederik Kaiser occupied the post of verifier of the Government's navigational instruments. Due to his efforts, new standards in particular for the instrumental aspects of the navigation technology were introduced. Long before his nomination Kaiser had argued unsuccessfully for such a reform. In this article is shown how and why finally his ideas were accepted. It is a first attempt to describe Kaiser's influence on the development of navigation technology in the Netherlands,