A boom (Arabic: بوم‎‎) (French: bhum), known as dhangi in India, is a medium-sized deep-sea dhow, a traditional Arabic sailing vessel. This type of dhow has two masts with lateen sails. a stern that is tapering in shape and a more symmetrical overall structure than other dhow types. The Arab boom has a very high prow, which is trimmed in the Indian version.The boom replaced the heavier baghlahs and ghanjahs which were more difficult to maneuver. Booms were mainly built in Beypore, Konkan and Gujarat, India, and Kuwait and are primarily used along the coasts of the Arabian Peninsula, Sindh, the west coast of the Indian Subcontinent, and East Africa.