To give you a more helpful answer, we need more context. Could you tell me:
* What type of vessel are you interested in? For example, are you thinking about cargo ships, ferries, sailboats, or fishing boats?
* What is the purpose of your question? Are you curious about the busiest shipping routes, or are you interested in a specific type of vessel?
Once I have more information, I can give you a more accurate and helpful answer!