I know what you're thinking, but I'm not out here experimenting with mascara. I'd not thought of this. No, the mirror was very helpful when I was working on the watermaker. With it I can see around corners. Back to rowing.
Spoons are more traditional to ocean rowing.
Hatchets are used by flat water racing boats. I must say that I am delighted with the performance of my hatchets in even very rough water. I can get a much better grip on the water, without going deep. Going deep is bad. The more you bury the shaft of the oar, the more work you create for yourself.