Read the text again. Answer the questions. (Đọc lại văn bản và trả lời các câu hỏi.)

1 What was the situation that the British government decided to deal with?

2 What surprised people about the winner of the Longitude Prize?

3 Why didn’t sailors use mechanical clocks to calculate their positions?

4 Why do you think the successful sea clock was called H4?

5 How was the challenge for the new Longitude Prize decided on?