Possible Clues:

• Waves to see it sound like it's 34 across
• Always wave to this
• Wind it up to make it rise on the water
• Not waves to it, waves on it
• Where there's not a swell like 10 across
• As a result of having got the wind up, this may act like 28 down
• It'd make you sick to get on its wavelength (5, 3)
• With rollers on it, 6 down could have been on it
• Choppy enough to soar with a huge addition