Aerospace Navigation: Tools, Concepts, and Techniques, Study notes of Ways of warfare

Download Aerospace Navigation: Tools, Concepts, and Techniques and more Study notes Ways of warfare in PDF only on Docsity! Aerospace Navigation Needed (and therefor developed) for over the ocean travel where there were no identifiable checkpoints. Three tools: Compass Clock Crude Sextant Latitude and Longitude Latitude divides the earth into North and South Do not divide the world evenly in half except on the equator Lines run parallel Longitude divides the earth into East and West Do divide the world evenly in half and create “great circles” Lines do not run parallel Nautical Miles Earth is 24000 miles in circumference One degree is 1/360 of 24000 miles or approximately 60 nautical miles One minute is 1/60 of a degree or one nautical mile Today, one nautical mile is one minute of arc on a great circle Great Circles A great circle is a circle whose center is the center of the earth or divides the earth in half A great circle route is always the shortest distance Errors of the Magnetic Compass Magnetic dip- the needle wants to point down and to the north Magnetic variation- the needle will points towards magnetic north and not true north Since magnetic north shifts, we can not say that it is true north, but true north is the direction that we indeed need. Magnetic deviation- the compass may be a degree or two off from assembly error On a compass, we would like the needle to point north, but since the straightest line from our position to north is through the earth, the needle will point towards the ground AND towards north, creating magnetic dip. South North