The latest development of our innovative workshop is the versatile CATS-GSM (CG). It combines the advantages of a typical remote download tracker with the size and flexibilty of a small retrievable data logger. In fact, it is both. In addition it usually comes equipped with solar cells, which can extent your deployment period up to years. Our new data reduction algorithm allows you to record high sampling rates (e.g. dive depth), reduce it through onboard statistcs in order to send the pre-defined summary via SMS to your CATS – webportal. However, if you can retrieve the CATS-GSM, you can download the data. We are able to use a variety of sensors for you to pick from and weight starts from a mere 25g.