I'm with Lodgecrest! It's not on the boat. There are no clocks that I could see and you're not allowed on the foredeck while the boat is in motion. This leaves you with a window of about 20 secs while the boat is at each pier to nip around having a look. Assuming the clipper staff let you look around! I'm sure the ticket guy on the boat today was on the verge of calling the police. When he asked what I was doing fiddling with the lifejackets under the seat I just nervously laughed and sheepishly explained I was on a treasure hunt. Fortunately I got given the 'how old are you?' look, not the 'Panic button,' look!
I think it's back to the piers again. Unless Lodgecrest has another train of thought on the matter?