In December 2018, Skeye executed a survey of a series of large breakwaters with a length of around 5 km on the pacific coast of Guatemala. The survey was done in collaboration with Deep from Amsterdam who performed the underwater survey using a multibeam sonar and CDR international. The latter were responsible for a further study on the subsea and aerial survey results to assess the condition of the breakwater.
CDR international, Deep BV and Skeye BV have teamed up to form the Breakwater Health initiative.
The aerial survey was done using a drone equipped with a GNSS L1 and L2 antenna to allow for calculating the photo positions using Post Processing Kinematic (PPK). The drone flew at an altitude of a mere 50 meters over the breakwater and collecting around 7000 images. These images were then transformed into a 3D model using photogrammetry.
By collecting a large number of extra ground control points Skeye was able to deliver accurate results to a few centimetres and perform a quality check to confirm this accuracy.