The nautical terminology is most definitely colorful and fascinating with these similes! adding the language element to the glossary truly does add further dimension.
I recall in numerous cases Fernando has described sword hilt elements, in one case where the hilt had resemblances to the horse bit and was described accordingly.
I suppose overall these kinds of descriptive terms are found in many types of descriptions, which makes etymology pretty intriguing.
There are some which I would leave alone, 'poop deck' ?