1. This man served as the navigation expert for the United Kingdom during WWII. In fact, he composed a navigation manual which was used by pilots of single-handed fighter aircrafts to navigate across Europe. In the latter years of the war, the navigational system he developed became standard procedure used by the Coastal Command. Who is he?

   Answer: D. Francis Chichester.
   
    

2. What is a term that was historically used to describe any line of position (LOP) resulting from celestial observation?

   Answer: B. Sumner Line.
   
   On December 18,1837, Thomas H. Sumner, an American sea captain, established a line of position from the observation of the altitude of a celestial body. This reference to an LOP is frequently referred to as the Sumner Line.

Below is the list of names of those who answered both questions correctly and the winner of this month's drawing.