Would have preferred it aganst the sea, but it's hard to move either boat or bike - owning neither!
I was thinking; what if you simply asked the owner.
Might end up being the sunbathing topless dame on the front deck. She wouldn't bother getting dressed for moving the bike a few yards, and as she flicks her leg over the seat and moves the bike, you try not to stare in any particular direction so as to make yourself look less like the dirty old fool you are.
"Is this spot okay?", she asks, as she throws you a smile.
"Yes, that's perfect!", you answer.
"Want me to stay on the bike?", she continuous.
"Oh yes, please do stay on the bike!"
and you take a snap, and then move around a bit to take a couple more shots to at least look like you know what you're doing. Yes, you almost feel like a professional again.
At home you quickly upload your images and find 5 pictures of an empty bike parked in front of a boat...
Thanks for sharing anyway.