Isn't it an extra way for the captain to check how the yacht is going, e.g. in a lock? Can't imagine it a real fenders.
I really love the Tim Heywood design, can't wait to see her in action!!
AMELS has it'n own youtube channel on: AMELSYACHTS's Channel - YouTube
I just noticed the conversation about the sea axe. I saw the ship a few weeks ago near to Rotterdam.
After google the sea axe...