The new Mariner II series of marine binoculars are available with or without a digital built-in compass. All lenses and prisms are multicoated for bright and sharp images. The eyepiece lenses come equipped with long (23.7mm) eye reliefs for better viewability and less eye fatigue. Select either Individual Focus (IF) or Center Focus (CF) type mechanism. The Mariner II series has a waterproof housing and includes a flotation strap to keep your binoculars afloat even if you should accidentally drop them into the water.