...It seems the Post Office thinks that sailing is rigorous and strenuousness. I say that it does not require a lot of arm strength and that it is easy. I really need some kind of documentation on how a 6 to 1 block and tackle works. How it cuts the weight by six. I also need something stating that using a harness does not require any use of my shoulders or arms. Last I will need something showing that a tiller is easy to use and does not require arm strength.
You're unlikely to find broad-based support for any of that from a sailor. Using a harness in no way means that you are not using your shoulders or arms, and in conditions where a harness is needed, sailing a Hobie Cat is rigorous and strenuous, 6:1 or not.