English: This illustration for the article Strake shows a cross-section of the bottom of a wooden boat, with garboard strakes, keel, frame, and keelson clearly labeled. It is based on but different from a similar illustration available to the public through the University of South Florida's Educational Technology Clearinghouse at http://etc.usf.edu/clipart/63500/63528/63528_strake.htm, which itself is a scan-and-clean-up of a long-expired drawing in the public domain. USF ETC allows the use of up to fifty (50) of their clipart illustrations for nonprofit educational purposes without written permission.