Sculling is a word that has two different
meanings:
Competitive sculling
In competitive rowing, sculling means
to propel a sculling boat or skiff, using two oars
(one in each hand), as opposed to sweeping which, strictly
speaking, means propelling the boat with a single oar held by both
hands. Most commonly, sculling is carried out by a single sculler
in a single
scull, but it is also common to see races involving sculling
boats that contain two, four, and even eight scullers.