Direction Whaler is a term used to refer to a type of whaling vessel that was used in the 19th century. The term is derived from two crossword solutions, THAR and Ahab, which are both four letters long. THAR stands for 'The Hunt At Sea', while Ahab is the name of the captain of the Pequod, a fictional whaling ship featured in Herman Melville's novel Moby-Dick. Together, these two words form the term Direction Whaler, which was used to describe the type of whaling vessel that was used during this period.