what have you learned on oso in the past year
#43
Registered
iTrader: (6)
Mercury Racing builds crap and they don't know anything about building engines or drives . I actually learned a whole lot. This is a huge collective knowledge base where I can get just about any information I need. How did I ever survive without the internet. Does anyone else remember going to the library and pulling a pile of books to try to find an answer? Now we all have the whole world's knowledge in our pockets! Thanks to all here for all of the help. I hope that I have helped some too. Merry Christmas my boating friends.
#45
Crazy Energy
Platinum Member
iTrader: (4)
Join Date: Aug 2007
Location: Oklahoma God's country no one else wants it.
Posts: 4,334
Likes: 0
Received 1 Like
on
1 Post
When your friends say, "Take us to the lake on your boat, I'll buy the beer and gas," Seems they are always in the Marina bathroom when its time to pay.
#47
You Can do 70mph in 12' Waves without Spilling Your Drink!
Accurate wave height assessment requires a PhD (& honesty).
Here's why:
National Data Buoy Center reported wave measurements are not directly measured by sensors on board the buoys. Instead, the accelerometers or inclinometers on board the buoys measure the heave acceleration or the vertical displacement of the buoy hull during the wave acquisition time. A Fast Fourier Transform (FFT) is applied to the data by the processor on board the buoy to transform the data from the temporal domain into the frequency domain. Note that the raw acceleration or displacement measurements are not transmitted shore-side. Response amplitude operator (RAO) processing is then performed on the transformed data to account for both hull and electronic noise. It is from this transformation that non-directional spectral wave measurements (i.e., wave energies with their associated frequencies) are derived. Along with the spectral energies, measurements such as significant wave height (WVHGT), average wave period (AVGPD), and dominant period (DOMPD) are also derived from the transformation.
Here's why:
National Data Buoy Center reported wave measurements are not directly measured by sensors on board the buoys. Instead, the accelerometers or inclinometers on board the buoys measure the heave acceleration or the vertical displacement of the buoy hull during the wave acquisition time. A Fast Fourier Transform (FFT) is applied to the data by the processor on board the buoy to transform the data from the temporal domain into the frequency domain. Note that the raw acceleration or displacement measurements are not transmitted shore-side. Response amplitude operator (RAO) processing is then performed on the transformed data to account for both hull and electronic noise. It is from this transformation that non-directional spectral wave measurements (i.e., wave energies with their associated frequencies) are derived. Along with the spectral energies, measurements such as significant wave height (WVHGT), average wave period (AVGPD), and dominant period (DOMPD) are also derived from the transformation.
#49
Crazy Energy
Platinum Member
iTrader: (4)
Join Date: Aug 2007
Location: Oklahoma God's country no one else wants it.
Posts: 4,334
Likes: 0
Received 1 Like
on
1 Post
Watching videos of boats with wind noise and rap music instead of engine noise suxs along with a 15 min video of a rooster tail.
Last edited by Velocity Vector; 12-21-2014 at 10:21 AM.