Het most important feature of a binoculars used while you are on the water is the level of waterproof. Further, it is desirable that the binoculars is filled with gas to prevent condensation. If you are on the water, you will be constantly moving due to the swell, so a biboculars which a large field-of-view is recommended. This kind of binoculars are used at sea to search for buoy, drowning people or shipping routes.
ormally, binoculars with a magnification of 7 times would suffice for watersports and maritime purposes. A higher magnification is not recommended due to the fact that you will be in constant movement on the water (because of the swell). This way, the likelihood of vibration in your view will be much larger and your field-of-view will become smaller. In most cases the user will pick an binoculars with an objective size of 50mm, so he can expercience a very large field-of-view. Below you will some example of binoculars which are suitable for use on the water. If you click on the image of the binoculars, you will be taken to the product directly for more information.