Marine current power the rotation of the earth. The sun acts as the primary driving force, causing winds and temperature differences. Because there are only small fluctuations in current speed and stream location with minimal changes in direction, ocean currents may be suitable locations for deploying energy extraction devices such as turbines. Other effects such as regional differences in temperature and salinity and the Coriolis effect due to the rotation of the earth are also major influences. The kinetic energy of marine currents can be converted in much the same way that a wind turbine extracts energy from the wind, using various types
Castle of the Winds Castle of the Winds Castle of the Winds (also known as "Castle of the Winds: Vanquish the Dark Forces") is a tile-based roguelike video game for Microsoft Windows. It was developed by Rick Saada in 1989 and distributed by Epic MegaGames in 1993. The game was given around 1998 into the public domain and provided as Freeware download by the author. The game is composed of two parts: A Question of Vengeance, released as shareware, and Lifthransir's Bane, sold commercially. A combined license for both parts was also sold. The game differs from most roguelikes in a number of ways.