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Summary of detection hours and hours analysed from May 2015 to January 2018 for the Helmsdale recording site.
| Year | Start | End | Hours analysed | Detection Hours |
|---|---|---|---|---|
| 2015 | 01/05/2015 | 05/10/2015 | 3,735 | 60 |
| 2016 | 07/05/2016 | 31/12/2016 | 5,431 | 226 |
| 2017/18 | 01/01/201730/03/2017 28/07/2017 21/11/2017 |
09/01/2017 11/06/2017 16/09/2017 28/01/2018 |
4,824 | 42 |
| Total | 13,990 | 328 |
