The waterproof Eterna Navigator with built-in compass. With porro prism design and large light throughput these binoculars are intended primarily for marine use. A key feature is the fixed focus – after a one-off adjustment for individual eyesight, gives the freedom to directly focus on a desired object without manual focusing! Perfect in rough seas. Rugged, robust and of course waterproof. If you should be unlucky enough to drop them in the water, Eterna Navigator will float!