In 2019 it was decided to re-survey the control markers. After 15 years in an exposed environment there will be some deterioration due to the salt spray as well as possible storm damage or misuse. The GPS equipment was not available so it was not possible to check the accurate location however, a more detailed survey of the area around the posts would set a benchmark when looking at the evolving environment around each marker.
A protocol to be used when visiting each marker was devised and this can be downloaded by clicking here. A few points were reserved as low-impact sites where only minimal data was collected to preserve the sensitive environment around the marker.
As each marker was visited a report was produced showing the results of the re-survey and these reports will be extended after future visits to the marker.
The table below lists all the control markers. Those in blue are active links to the re-survey report for that marker.