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Colin’s Conundrums-30. 20 Oct

Questions Week 30

1: Weather

Q1: The term “significant wave height” used in Bureau of Meteorology forecasts describes the:
a. average height of the highest one-third of the waves
b. a big wave
c. the average height of the highest waves
d. rogue waves

Q2:The Bureau of Meteorology “coastal waters forecasts” are for areas within 60nm of the coast.
TRUE                          FALSE

Q3: The term “Wind speed” used in Bureau of Meteorology forecasts describes the:
a. highest wind speed including gusts.
b. lowest wind speed apart from gusts.
c. highest wind speed, gusts may be up to 40 per cent lower.
d. average wind speed, gusts may be up to 40 per cent stronger.

Q4: A high pressure area is also called:
a. a frontal zone
b. cyclonic
c. a polar front
d. an anticyclone

2: Navigation
What is Lee Bowing the Tide. Explain how it can help

3: Rules
Green is holding still by luffing at the line. Red is heading to pass her stern on starboard but Blue comes from above, also on starboard and calls for water.

Should Red keep clear?

4: General Sailing
Q1: The red circle in the following images identifies which sailing term?

Q2: An emergency wreck mark has which of the following top mark characteristics?

         A                      B                      C                      D

 

Q3: What is an emergency wreck mark used for?

 

Q4: Which of the following colours identifies an emergency wreck mark?

          A                         B                       C                      D 

5:Mystery Objects

 


Answers Week 29

1: Rules
Green is holding still by luffing at the line. Red is heading to pass her stern on port but Blue comes from above, also on port and calls for water.

Should Red keep clear? YES The green boat is an obstruction, because both Red and Blue must keep clear of Green under rule 10. Therefore rule 19.2(b) applies and the outside boat (Red) must give the inside boat (Blue) room to pass the obstruction (Green).

2: I.R.P.C.S
What does this sound signal mean?” Agreement by other vessel

3: Weather
1. On marine weather charts a three and a half feathered arrow indicates a wind speed of:
a. 35 knots
b. 53 knots
c. 15 knots
d. 25 knots
2. A strong wind warning indicates average winds over:
a. 35 knots
b. 53 knots
c. 15 knots
d. 25 knots
3. A cold front is drawn on a weather chart as a curve with black semi circles lining its eastward edge.
a. TRUE
b. FALSE

4: Mystery Objects

5: Navigation
1. What is important to check when transferring a position from GPS to a chart? That GPS and Chart are using the DATUM
2. When using a buoy as an aid to navigation, what do we always need to considered? It may have moved
3. You are about to sailin  pass another yacht  in a close situation. What can happen in this situation? Suction can be created that forces boats together