MC: click A/B/C/D. Written: type an answer, then reveal the reference, grade, or ask Claude. Answers stay hidden by default — use Show answers to reveal all at once. AI responses are saved in your browser.
Q1
The wind was steady for a long time at 15 knots and then increased to 25 knots in the past 20 minutes. What seas would you expect over open ocean?
💡 Show hint
Consider all the factors that contribute to final sea state.
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AI answer
Q2
The Low associated with a frontal wave in an extratropical cyclone tends to move in a direction....?
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We need a weather map in front of us to make use of this knowledge.
(no stored answer — AI will propose one)
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Q3
What is the 34-kt Rule recommended by the NHC for tropical storm maneuvering?
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Q4
In the northern hemisphere, winds veering sharply to the west or northwest with increasing speed are indications that a ...?
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Q5
When in the vicinity of the Gulf Stream, which is the best indicator of the location of the strongest current band?
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The idea here is you are near the strong current but not yet in it.
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Q6
You should log all barometer readings taken at sea ...?
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Q7
A stationary barometer indicates ...?
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Stationary barometer means no change in barometric pressure.
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Q8
We are cruising at 12 knots on course 200 True. We anticipate a new wind of 25 knots from the west. If we drop our speed to 7 knots, what will be the apparent wind speed and angle?
At what minimum wind speed can a person (typically) first physically feel the presence of wind?
💡 Show hint
Many sailors believe the back of the neck is the most sensitive gauge.
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AI answer
Q10
When a typical Low pressure system first approaches, you might expect the barometer to drop at a rate of about ...?
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We are not talking about the passage of the low itself, but its approach.
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Q11
Which surface pressure would represent stormy conditions?
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A millibar is the same as a hecto pascal.
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Q12
According to Buys Ballot’s Law, with the wind at your back, the center of a low pressure can be located ...?
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Q13
“Mare’s tails” and “Mackerel skies” are ...?
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These terms play a key role in a famous adage on marine weather.
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Q14
Winds at any level travel with low pressure on what side?
💡 Show hint
Note it says at “any level.” If the choice of hemisphere matters and is not specified, assume northern.
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AI answer
Q15
Which direction are storms not likely to come from when we are in the temperate latitudes?
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It doesn’t say which hemisphere and the hint is that it does not matter.
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Q16
“Red sky at night, sailor’s delight” is ...?
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See Matthew 16:2 in the Bible for an early use of this phrase.
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Q17
What is one of the best natural signs that the weather might get worse the next day?
💡 Show hint
Note that all are signs of the possibility of poor weather. But one is better than all the rest — especially in the summer.
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Q18
What would likely be the earliest natural sign of an approaching deep Low?
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We are asking about things we can see or measure from the boat.
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Q19
The absence of the usual sea breeze in coastal waters could imply...?
💡 Show hint
Assume normal conditions for a building sea breeze are all present, it just isn’t there.
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Q20
If you count 20 seconds between seeing lightning and hearing the thunder, how far is the storm away from you?
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The speed of sound in air is about 331 meters per second.
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Q21
Whitecaps are first seen on the water when the wind speed is about...?
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Are there other factors that affect the appearance of waves besides wind?
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Q22
The term “Beaufort force 5” used on Pilot charts and in other references to marine weather means ...?
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A fundamental part of seamen’s weather terminology.
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Q23
What aspects of cloud identification should be kept in mind when considering the nature of clouds and their significance ...?
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Q24
What can be said about all frontal passages — cold, warm, or occluded?
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Q25
Your average course is 220 at 10 knots. The wind has gradually changed from 250 to 190 and built from 10 to 20 during this period as the stratus clouds base has been lowering. It has just started raining a steady light rain. What is your forecast for the wind?
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AI answer
Q26
You are tacking north against a good wind, in an area known for strong tidal currents. You note you are sailing parallel to a wide band of water with many more white caps than where you are. To make the best progress north what should you do?
💡 Show hint
Assume the actual sea state is about the same to the right or left, there is just more white caps on one side.
(no stored answer — AI will propose one)
AI answer
Q27
Which frontal condition will have the most severe weather?
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Q28
According to Buys Ballot’s Law, when an observer in the Northern Hemisphere experiences a northwest wind, the center of low pressure is located to the...?
💡 Show hint
If you don’t know the law, draw a Low with the wind around it.
