ASSIGNMENT  12 Textbook Assignment: "Weather Observation (continued)," and "The Ship's Bridge," chapters 10 and 11, pages 10-15 through 11-8. 12-1. Which  of  the  following  conditions would mark the passage of a warm front? 1.    Pressure  usually  rises 2. Wind will advance from the southeast,  shifting  to southwest 3. Rapid  temperature  change 4. Decreased visibility 12-2. What is the maximum distance clouds  will  start  to  define themselves  prior  to  the  passage  of a warm front? 12-3. 12-4. 12-5. 12-6. 12-7. 1. 50 mi 2. 100 mi 3. 500 mi 4. 1,000 mi What type of clouds accompanies a warm  front? 1. Low  range 2. Mid  range 3. High  range 4. Each of the above Where are cold fronts located? 1. In  well-deemed  pressure troughs 2. In  shallow  pressure  troughs 3. Originally in northern regions 4. Between two air masses of the same  temperature How will the pressure react in advance  of  a  cold  front? 1. Steady  or  unsteady  fall 2. Steady  or  unsteady  rise 3. Remain  the  same From what direction will the wind first approach during a cold front? 1. North  or  northeast 2. South  or  southeast 3. East  or  southeast 4. West  or  southwest What type of clouds is likely to form in advance of a cold front? 1. Towering  cumulus 2. Cumulonimbus 3. Stratocumulus 4. Each of the above 12-8. Which  of  the  following  conditions would mark the passage of a cold front? 12-9. 12-10. 12-11. 12-12. 1. Rise  in  temperature 2. Decreased visibility 3. Gradual clearing of the sky 4. Fairly  rapid  wind  shift What type of front is the result of a warm and cold front converging? 1. Warm 2.    Cold 3. Occluded 4. Predominant With  regard  to  occluded  fronts, the  most  violent  weather  occurs  on the upper front for a distance of how many miles north of the northern  tip  of  the  warm  sector? 1. 25 to 50 2. 50 to 75 3. 50 to 100 4. 50 to 150 Your ship is heading 180° at 17 knots, and the true wind is blowing from the south at 5 knots. What is wind speed? 1. 5 kn 2. 12 kn 3. 17 kn 4. 22 kn Which of the following equipment measures  wind  speed? 1. Psychrometer only 2. Synchronometer 3. Anemometer only 4. Psychrometer or anemometer 79