A superyacht is a commercially operated luxury yacht (motor or sail powered), which is professionally crewed and has a loadline length of 24 metres and above. Some yachts are either used exclusively by their owners or are available part-time for commercial charter, while others are operated all year round as charter businesses. The number of very large yachts has grown rapidly since the 1990s and increasingly only yachts above 65 metres (213ft) stand out among other luxury yachts.