Even though it’s bout underwater photog, it’s relevant for you, cause the best shot you will get from the shore of something in the water is if you can put the camera underwater – a waterproof one or in a case.
https://forum.inaturalist.org/t/underwater-photography-equipment/30468/3
Olympus can be hard to use if you yourself is out water, so if you have a simple mask that lets you see the screen underwater, it’s an adventage.
With regular DLSR my best advice is try to get as vertically above the subject as possible, it eliminates most of sparkles and distortion, but with waves nothing can help you.
e.g. https://www.inaturalist.org/observations/26683347
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