Possible Clues:

• Built-up US town with river running through? That's a little bit funny
• Using the internet encompasses �electronic' right? - it's not much of a joke
• Quick joke about eastern ship
• Short gag
• Youngman's specialty
• Crack appearing in a vessel
• Brief joke
• Tiny size of fleet is a joke
• Monologue delivery
• Short and funny individual seen on ship