"Make my own dog biscuits on board? Why?"
"We follow a dogma of clean and lubricate often. Life jackets, harnesses and tethers get dirty."
A cruising passage can be one of the highest decibel experiences you will have: engine and drive train noise, the wind in the rig, plus waves drumming on the hull. Soundproofing can help.
Anyone who has suffered from it, knows that Seasickness can be more crippling than a broken leg. But there are lots of preventatives and remedies.