Yachts compete in various classes, sailing courses in Block Island Sound and circumnavigating the island. He accompanied explorer Matthew Flinders in circumnavigating Australia. It broke the world record for circumnavigating the globe in a motorized boat. At the same time, between 1577 and 1580, Sir Francis Drake was circumnavigating the globe. Gray returned to Boston in July 1793, after again circumnavigating the globe. Guinness World Records designated their effort as "fastest unsupported row circumnavigating UK mainland waters". Total shoreline including tributaries is , circumnavigating a surface area of . As of 2016, Solar Impulse, an electric aircraft, is currently circumnavigating the globe. The "Ring of Beara" follows the roads for about circumnavigating the peninsula. It consists of routes for circumnavigating the lakes, either individually or collectively. It is now in what could be called a non-interrupted, or circumnavigating, orbit. Circumnavigating or penetrating them may be disastrous and pilots avoid them. The S100 "Centrumring" is a smaller ringroad circumnavigating the city's centre. After circumnavigating the galaxy Wilson and Anna Kime also joined the ANA.