When you spot these birds, be ready to run them down. There's a good chance fish are near. You'll be surprised at the number of boats who cruise past these birds because they're not easy to see, unless you have good optics. Rely on your binocular's compass for quick bearings. Your time is important and the ability to get accurate bearings allows you to quickly find feeding birds and the fish that others might miss.
Rough seas require a different approach.
In windy, choppy conditions many sportsfishers abandon their optics because they can't get a clear picture and the constant motion strains their eyes. However, by bending you knees and anchoring the optics on the bridge of your brow, a steady sight is provided. This is where you'll appreciate the soft foldable eyecups and the diamond precision view of a good binocular. Continue to use your binocular in near darkness or dense fog. A major benefit of good optics is the ability to spot distant objects in extremely low light conditions.