puzzle........

1.. During the second world war on a foggy day the Americans and British had the following conversation:
Americans: "Please divert your course 15 degrees to the North to avoid a collision."
British: "Recommend you divert YOUR course 15 degrees to the South to avoid a collision."
Americans: "This is the Aircraft Carrier USS Abraham Lincoln, the second largest ship in the united states' atlantic fleet. I demand that you change your course 15 degrees north or counter measures will be taken."
The British were unarmed and did not move. What made the Americans change their minds?

2.A man is alone on an island with no food and no water, yet he does not fear for his life?