Stick charts were made and used by Marshallese to navigate the Pacific canoe off the coast of the Marshall Islands. The graphs represented the main ocean wave patterns and the ways in which islands broke them, usually determined by the detection of ocean breaks by islands during sea navigation. Most stick graphs were made from the ribs of the coconut leaves that were tied to form an open structure. The locations of the islands were represented by shells tied to the structure or by the tied junction of two or more sticks. The wires represented the predominant wave crests on the ocean surface and the directions they took as they approached the islands and found other similar wave crests formed by the ebb and flow of the circuit breakers. The individual graphics varied so much in form and interpretation that the individual browser that created it was the only person who could fully interpret and use it. The use of bar charts ended after World War II, when new electronic technologies made navigation more accessible and canoe trips decreased between islands.