Do you always tend to forget how many laps you swam in the pool? Never quite know how far and how fast you swim in the sea? Find it hard to navigate in open water swim? Platysens Marlin is a Swim Meter designed to tell you a detailed analysis of your swim performance through voice feedback by using a bone conduction headset. Your pace is reported to you as you swim with no disruption to your swim stroke. In open water swims, your swim performance is captured with GPS. In the pool, motion sensors are used when there is no GPS reception. After your swim, you can connect Marlin to your phone with Bluetooth to review your data and update configurations.