What Means a cours or line of travel?

What did the spanish use to protect their commerce in the new world? What hardships did the merchants face? How do you get to antanctica? Where was the Lewis and Clark expedition? What Country did Lewis and Clark sail from? How many ships are in the UNSC? Did the mayflower sail with the pinta Nina and santa maria? Where did Balboa journey end in? What did the king say after Cortes asks to go to the new world? What did Juan Rodriguez gain from the voyage? Where is Narkutsk? What is jablesse? What did Giovanni da verrazano do on his voyage? Who sponsored the voyages? In their journey westward Lewis and Clark traveled the furthest distance on which river? What discoveries and improvements in sailing helped European explores in their search for global expansion? What was Abel Tasman's destination? What is the difference between shipwrecked and marooned? Who did Alexander Mackenzie sail for? Is Saint Elmo a patron saint of sailors?