The Deep Sea Series is a marine treasure chest of binoculars designed specifically for the nautical world and boating enthusiasts. With 7x magnification (most popular size because of the steady image achievable under rough sea conditions) and exceptional optics, these binoculars provide clear views of marine observation from dusk till dawn. In addition, selected models include an internal rangefinder and directional compass for navigation. The Deep Sea series includes a wide range of seaworthy roof and porro styles and sizes to meet the needs of the experienced or beginning mariner. There's even a Deep Sea model that FLOATS! Backed by Limited Lifetime Warranty.