Lets see if I did this right.

Originally Posted by Sitka deer
Negative, cavitation is when the propellor or impellor moves liquid so fast it creates bubbles and the bubbles collapse back on themselves. It is a term in science.

Ventilation is when the design of the boat allows water air to get under the hull and into the prop or pump. They are not the same thing and yes, many people do not know the difference.

http://www.dictionary.com/browse/cavitation

cavitation
[kav-i-tey-shuh n]
Spell Syllables
Word Origin
noun
1.
the rapid formation and collapse of vapor pockets in a flowing liquid in regions of very low pressure, a frequent cause of structural damage to propellers, pumps, etc.
2.
such a pocket formed in a flowing liquid.
Origin of cavitation