Delft, 31th Jan 2018 – The interior region of Silhouette is a national park, with some of the richest biodiversity in the entire Indian Ocean. It is also home to several, critically endangered, plants and animals. In order to keep track of the different species on the island and gain insights into the unique ecosystem, an up-to-date map is an essential tool. However, this was not possible for half a century due to its rough environment with mountaintops up to 740m and its remote location. Our hybrid mapping drone Marlyn has enabled cartography professional TFC International to map this tropical island paradise, kicking off the project for mapping the entire Silhouette national park with great detail. These flights prove again that Marlyn is capable of mapping under these extreme conditions.