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Boating Quiz
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Moderators, Business & Finance Moderators, Science, Health & Environment Moderators, Society & Culture Moderators Posts: 51,685 Mod ✭✭✭✭
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Me Sir me Sir, please please me Sir.....
Apparent wind wll be forward of the true wind, so if all you're doing is using the windex to keep it at 90 degrees, you'll wind up out to sea and miss your intended destination...... I think!
Have always struggled to get my head around apparent wind, so will be interested to see if I've got that right, or in fact am sitting impaled on a rock on the shore....
OK, here's one for those boats with the white flappy things..
It's a perfect day, you can see your destination 10 miles straight ahead. To the left is the coast, to the right is open sea.
The wind is exactly 90 degrees to port (as you face where you want to go) so you're all set to put up the sails and have a pleasant reach home.
Suddenly, a fog appears, and you can no longer see home. The wind remains constant and there is no tide. At the same time, aliens appear and simultaneously bust your compass and rob the batteries from your GPS (and smart phones, other nav aids etc..) so the only thing you have to rely on is the wind indicator at the top of the mast.
Knowing that home was straight ahead and that the wind was exactly 90 degrees to port, you set sail and steer the boat to keep the wind indicator at 90 degrees.
Will you:
A: Run aground on the coast to the left?
B: Hit your destination spot on?
C: Head out to sea and miss landfall?0 -
Spot on Heidi, well done! :cool:
As the boat builds speed, the windex will move forward with the apparent wind so in order to maintain it at the same angle, you need to bear off.
In this case it would mean turning to starboard and heading out to sea.
Scary thing is that it takes about 2 minutes to reach speed for a given wind so neither the helm nor crew would notice it.
So, next question, in the absence of any other navigational aids, in theory, how could you maintain course?
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I admit defeat - you've got me there!
But i can't wait to see the answer from someone who actually properly understands this stuff.
It feels like a fog slowly (very slowly!) clearing... by the time I'm too old to race/sail I'll have finally got my head around it all:DSpot on Heidi, well done! :cool:
As the boat builds speed, the windex will move forward with the apparent wind so in order to maintain it at the same angle, you need to bear off.
In this case it would mean turning to starboard and heading out to sea.
Scary thing is that it takes about 2 minutes to reach speed for a given wind so neither the helm nor crew would notice it.
So, next question, in the absence of any other navigational aids, in theory, how could you maintain course?0 -
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Yup...
And the dark ripply patches / waves by sheer coincidence happen to normally line up perfectly with the true wind direction...
So, if you were to steer parallel to the waves then, guess what?
Ah here.... hard enough to spot the patches, never mind figure out which direction the ripples are in and then sail along them....
Nice theory (filed for future pray-it-never-happens emergency situations) but I hope I never have to try to put it into practice :eek:
Top marks for the quiz question though 0 -
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