A pilot flying solo is in a somewhat difficult position as regards air navigation. Too much in my opinion has been written about how to navigate an aeroplane for the man with an array of instruments and a comfortable chair and chart table to work at, and not enough for the other poor unfortunate. The pilot navigator (always excepting people like Mollison or Lindbergh, Amy Johnson or Jean Batten) is limited, and has to find his way about mostly by map-reading, but if he does his job properly he should at least find out the wind from the weather people, and use it to calculate his course to steer and his ground speed. These will never be quite right, but will be near enough for him to start off; he can checlr how he is going by his map and make the necessary corrections.