Apparent wind that measures wind speed in knots and wind direction in degrees relative to the heading of the boat. Modern instrumentation can calculate the true wind velocity when the apparent wind and boat speed and direction are input. In sailboat racing, and especially in speed sailing, apparent wind is a vital factor, when determining the points of sail a sailboat can effectively travel in. A vessel traveling at increasing speed relative to the "prevailing wind" will encounter the wind driving the sail at a decreasing angle and increasing velocity. Eventually, the increased drag and diminished degree of efficiency of a sail
Wind power in Germany behind China and the USA. Since 1995, onshore wind energy has been an important and major industry in Germany. In 1995, the total onshore wind installed capacity was 1,530 MW. By 2018, onshore wind power installed capacity reached over 88 GW, which allows Germany to power about a fifth of the country from wind. Larger onshore installations are in the works, which could possibly see a larger percentage of wind energy powering Germany. Offshore wind energy also has great potential in Germany. Wind speed at sea is 70 to 100% higher than onshore and much more constant. A new generation