The Minox BN 7x50 C II are an excellent tool for marine navigation. In addition to the features of the BN 7x50 II binoculars, they are equipped with a built-in Suunto compass with global capability, and a ranging reticle for precise distance measurements. The Minox BN 7x50 C II binoculars are rubber armored, waterproof, and nitrogen purged for sustained durability. Focusing is by individual eyepiece so once adjusted to the user's eyes, they will be in focus from 39' to infinity. Their 24mm eye relief means they will provide a full field of view for everyone, whether wearing eyeglasses or not.