When it is dark, rainy and foggy or objects are too far away to see, the MR-570R acts like as your "third eye". The bright and clear LCD display and easy to operate key layout, always provides reliable information, even in critical situations. In the uncertain and unpredictable ocean, one thing you can count on is the MR-570R, will always help guide you where you want to go, safely and easily with powerful 4kW output generating observations for up to 36 nautical miles