Originally posted by DonMichaelCorleone:
...Whoever it was that shot him why would they even need to be on the boat in the first place (if it wasnt to kill him of course)
To bring the boat out on the lake for him and if necessary, help him reel in a fish.
As a member of the Corleone family, and brother of the Don...Fredo would probably expect to have the boat operated for him. Even without Anthony, once he was called away by Connie.
Apple