Final answer:
The owner or operator of a vessel less than 100 tons must be knowledgeable in navigation and safety procedures, rather than having physical charts on board, and should be able to navigate by natural means like the position of the noontime Sun.
Step-by-step explanation:
If you are the owner or operator of a vessel less than 100 tons, you are not required to have the charts, documents, and publications onboard as long as you have sufficient knowledge of navigation and safety procedures. The ability to navigate using natural elements such as the noontime Sun is critical. For instance, seafarers historically determined their latitude by measuring the position of the Sun at noon, and modern navigation tables can assist in providing the appropriate angle needed for accurate positioning at sea.
It's essential to be adept in navigation and safety procedures when out at sea, especially when there is potential difficulty in seeing the horizon at night. While local weather patterns may aid in planning and safety, being equipped with knowledge and techniques for finding one's location, such as using the noontime Sun or consulting navigation tables, is vital for a vessel operator.