The Novega PT9 C-PROOF beacon is a seawater-proof underwater locating device, which has been specifically developed for the installation on data storage capsules/final recording Medias (FRM) of Voyage Data Recorder Systems (VDR/S-VDR). The PT9 C-PROOF beacon has been designed to send a locating signal for at least 30 days in the case of being activated by water immersion. The PT9 C-PROOF beacon is approved by the BSH, The German Federal Maritime and Hydrographic Agency. The PT9 C-PROOF beacon distinguishes itself considerably from the other known systems. It does not only have corrosion protected components as coatings and contact areas; but is also equipped with a patented, intelligent activation. Confounding factors like as rain, sea spray, condensation etc will mostly be blocked out through this function. The advantage of this is that the number of unwanted activations is reduced to a minimum.