A scull boat is a type of rowing boat that is propelled by the rower or rowers using a pair of oars, one in each hand. Unlike other rowing boats, such as sweep boats, which are propelled by only one oar per person, sculling boats require the use of two oars at once. This makes them more challenging to row, but also gives the rower more control over the direction and speed of the boat. Sculling boats are typically used for racing or exercise, and come in both singles (one person) and doubles (two people) varieties.