Assignment 3 - Time and Direction

Please complete Sections 2.4 and 2.5 and the Tutorials BEFORE you complete this Assignment.

For this Assignment, assume that it is not Daylight Savings Time. Refer to the appropriate Tutorial (Navigation at Sea and Time)  to complete this homework. Answer the questions directly in Canvas. For assistance, review Unit 0.21 "Turning in Assignments".

Please use this online time zone map Links to an external site. to complete your homework. If you are able, you may find it easier to print out a copy of this map.

1. How many time zones are in the 50 United States?

2. If it is 3 p.m. in New York City, then it is what time in Honolulu?

3. If it is 3 a.m. Tuesday in Tokyo, then in San Francisco it is what time and day?

4. If it is 7 p.m. Friday in Rome, then in Hong Kong it is what time and day?

5. Suppose you are drifting in a lifeboat in the ocean. You observe the Sun is directly overhead as you hear on the radio that it is 5 p.m. in Los Angeles. You happen to know that LA is located at 120° west longitude. Your longitude in the lifeboat is what? (remember to include east or west)

6. Later in the day, still in the lifeboat you observe the star Polaris 19° above the horizon. What is your latitude?

7. On a different voyage you ship goes down again! And you are again drifting in a lifeboat. Your watch is set to New York time and reads 3 p.m. but you observe that the sun is just setting. Soon after, you see Polaris very close to the horizon. What is your longitude (you will need to find the longitude of NYC to answer this)?

8. What is your latitude?

9. Find a World Map online with meridians and parallels (if you happen to have access to a globe, you may find it a better tool than a map to use for this problem).  Estimate how far it is from Quito, Ecuador to Singapore. The trick is to know about latitude, longitude their relationship to distance, and the circumference of the the Earth. Once you figure out the trick, the calculation is a snap.