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How high can you jump?
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NickB



Joined: 30 Jun 2009
Posts: 498
Location: Alameda, CA

PostPosted: Fri Jan 11, 2013 9:18 pm    Post subject: Reply with quote

makes sense. thanks.
before this thread, I'd have called Gerritt's jump on that beautiful picture a 12ft jump because he appears to peak at about 12ft above the water (from his eyes, looking down).
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MrFish



Joined: 04 Sep 2009
Posts: 238

PostPosted: Sat Jan 12, 2013 1:14 pm    Post subject: Reply with quote

A couple of things:

1. How does this thing work on an ipod touch, which has no GPS?

Misprint?

2. I'd call Garret's jump 4-5 ft, prolly 5.

3. I had a Garmin 201 for years, it was very accurate for speed.

I'd guess that all of these devices would be less reliable for height.
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keycocker



Joined: 10 Jul 2005
Posts: 3457

PostPosted: Wed Jan 23, 2013 12:32 pm    Post subject: Reply with quote

Glen the Weatherman in Maui often mentions the wave height numbers.
He says that Hawaiians use the number at the buoy which measures the mean difference from sea level. This would be about half the swell face when you are outside and even less when the shoreline effects jack up the faces.
It would also be an average of the big and small swell coming through, not the ones we are looking to ride.
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zirtaeb



Joined: 03 Jul 2009
Posts: 2407

PostPosted: Wed Jan 23, 2013 6:12 pm    Post subject: Reply with quote

Yes, measuring wave heights at the buoys has tons of relevance to wave heights on shore where you windsurf.
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keycocker



Joined: 10 Jul 2005
Posts: 3457

PostPosted: Wed Jan 23, 2013 10:22 pm    Post subject: Reply with quote

That is the swell height number you get from NOAA which has a big presence here. Locals know that when talking waves and apply their own experience as to shoreline jacking effects.
If you say it is 4 ft South swell they know that means overhead at Grandmas and 10 ft faces at thousand peaks or maybe 9 but with the NOAA number you got the raw data on which the speaker is basing the call.
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LeeD



Joined: 12 Jun 2008
Posts: 1033

PostPosted: Wed Jan 23, 2013 10:38 pm    Post subject: Reply with quote

Did you forget period and direction? Location?
This last "big" swell was mostly 2' at 25 seconds, resulting in waves as large as 20' at Mavericks.
A swell rated 2' at 8 seconds would not show a ripple there, or at inside Ross's Cove.
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keycocker



Joined: 10 Jul 2005
Posts: 3457

PostPosted: Fri Jan 25, 2013 12:28 am    Post subject: Reply with quote

Ever chat with a Hawaiian surfer?
They name the direction as in North swell 4ft but then the conversation switches to jacked up trucks and nookie.j
I am not promoting the methodology, only explaining why their numbers seem inconsistent with the waves faces they are discussing.
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keycocker



Joined: 10 Jul 2005
Posts: 3457

PostPosted: Fri Jan 25, 2013 12:37 am    Post subject: Reply with quote

On a related topic.
When you look in the Maui news at the wind it says 5 to 15 that means 20 to 30 at Kanaha.
No problem. We know what it means, but the tourist seem a little confused.
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zirtaeb



Joined: 03 Jul 2009
Posts: 2407

PostPosted: Fri Jan 25, 2013 8:00 pm    Post subject: Reply with quote

"ever chat with a Hawaiin surfer" ....
I've been to Oahu to surf over 12 trips, two of which we stayed over 3 months in the winter.
LanceHookuono lived at my house for 2 years, when drugs caught up to him on SouthShore and he needed refuge.
Just like on the mainland, some exagerate, some tell it like it is.
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keycocker



Joined: 10 Jul 2005
Posts: 3457

PostPosted: Mon Jan 28, 2013 3:46 am    Post subject: Reply with quote

Didn't mean to rile you.
I was making a joke with LeeD about debating periodicity with guys in baggies.
My apology, the explanation I gave was not my own.
I attributed it correctly to Glen the weatherman on public TV Maui.
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