One of the major benefits for a cruising vessel is to be able to enter shallower seas – catamarans have a shallower draft than monohulls and therefore a great appeal to folk for whom this is a major consideration. Most lagoons are only 6-8 feet deep in the South Pacific. The Caribbean and other areas where you have reefs to navigate and shallow sandbanks to cross to enter overnight anchor stops draft is a very important consideration. Always remember to read your tide tables and swell.