sleeve: The plastic jacket on the shaft of the oar upon which is mounted a button, used to secure the blade to the oarlock.
A small wooden strip on a gunwale that forms or supports an oarlock.
outrigger: A framework attached to the shell and used to support the oarlock; also called a "rigger".
a short light oar used without an oarlock to propel a canoe or small boat.
