For instance, if you intend to bring pets on board, special clearances may be required for the animals to leave the boat. If you intend to dive, prepare to present proof of qualifications, along with visas, international proficiency certificates, and local cruising permits. The website Noonsite provides a comprehensive list of documents required both in the U.S. and abroad. The American Sailing Association website also offers a checklist of proof-of-competency certificates and documents. [links]