At anchor
Once anchored up in a beautiful bay for the evening, you’ve got so many photo opportunities. Use the drone, tender or try swimming in the water with a Gopro. The drone will allow you to include the backdrop of the bay from an elevated angle. Or how about flying the drone over the land, if safe to do so, to include the location in the foreground? If you’re anchored close to shore you can also send the drone high above for an overhead shot of the boat and coastline.
From your tender you can get a lovely low-level shot with the coast in the background, especially if the afternoon (or morning) sun is giving you some warm light. A longish telephoto lens will make the boat appear closer to the shore than it really is.
You could also try shooting images when immersed in the sea with your Gopro. For a small cost you can buy a dome for your Gopro for an overwater/underwater image – in clear water you’ll be able to see the keel below the water and the topsides and rig above. It’s almost impossible to pull off this shot without the dome, even in flat water, as the water level needs to be half way up the lens. However, with the dome, which measures about 15cm in diameter, you can submerge half way with ease.