The term 'Dinghy Thing' can be solved by the three-letter word 'OAR'. An OAR is a long, flat piece of wood or other material used to propel and steer a boat through the water. Oars are usually held in place by an oarlock, which is a U-shaped piece of metal attached to the side of the boat. Oars are used in both small and large boats, and are often used in conjunction with a sailboat's sail to help steer the boat.