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5) Lunar distance method- This method was used to calculate longitude before the chronometer was invented by observing the angle between the Moon and another celestial bodies. By using this method, Cook mapped more than 5,000 miles of coastline relatively accurately during his first voyage (1768-71).
Cow Hitch - How to tie a Cow Hitch - also called the Lanyard Hitch, Lark’s Head and Lark’s Foot, is used to secure a rope to a post or other object including another rope. It is similar to a Clove Hitch except that the second half hitch is in the opposite direction. It is about as reliable as a Clove Hitch, which is to say it should not be trusted in critical applications.