During Scuba Diving it is often need to write down some notes under water. Previously used writing boards for underwater have a limited size to make notes due to their analogous function. Our writing device consists of a pen and a tablet and is equipped with an e-ink display. It offers the advantage that you can draw/write as much as you want. It can be used for sketches, annotations or you can download some underwater maps on it. All data is stored and can be viewed and transferred to a computer.