these keep the lite out of a room.
A boat without a keel point at both ends is typically referred to as a catamaran or a flat-bottomed vessel. This design can lead to instability and difficulty in maintaining direction, especially in rough waters, as it lacks the directional stability provided by a keel. Such boats are often more maneuverable but may struggle with tracking straight. Overall, the absence of a keel at both ends can affect the boat's performance and safety.
a small and light boat with pointed ends
canoe kayak
A boat without a keel pointed at both ends is typically referred to as a "double-ended" boat. This design allows for efficient movement in either direction, making it versatile for various water conditions. However, the absence of a keel can make it less stable and harder to maneuver compared to keel-equipped vessels, especially in rough waters. Common examples include some types of canoes and traditional fishing boats.
A traditional flat-bottomed calm water boat, blunt both ends and propelled by a pole, is a punt.
Because without both ends connected there can not be a flow of electrons from one end of the battery to the other.
rowboat
Its a canoe.
Proa
Scooner
kayak. tugboat.