Due to my profession as a hydrographic surveyor I started collecting navigation and land survey instruments. Over the years I used, repaired and calibrated a wide range of instruments as sextants, levels, theodolites, transits etc. Due to this I became interested in collecting these instruments as well. On this page you will find the nautical instruments (part of them are replica's and reconstructions) in my collection. In addition to that I also have a collection of land survey instruments.