the air flows thows thw water
yes
A hovercraft or air-cushion vehicle (ACV) is a craft designed to travel over any ... in their ability to travel equally well over land, ice, and water
Air travel faster over water than land due to the smooth surface of water causing less friction compared to the uneven surface of land. This reduced friction allows the air to flow more freely and at a higher speed.
by air.
Sound travels faster and further in water compared to air due to water being denser and providing a better medium for sound waves to travel through. In water, sound can travel over longer distances and at higher speeds than in air.
Sound can travel faster and further over water compared to air, but it does not necessarily get louder. The sound intensity can remain the same, with the medium affecting how far the sound can travel and how well it can be heard.
That would be a hovercraft. However, hovercraft are not really boats and can travel on both land and water.
in water
Since air has a lower optical density than water, light waves can travel faster in air.
Air deals with the intellect, logical thinking, communication of ideas and travel, by air. Air is objective. Water deals with the emotional nature, expression of the feelings, the subconscious, travel by water. Water is subjective.
as long as they are both traveling through the air, then the speed is the same.
Many things have no engine and can't travel on water or air, a bicycle and a brick are two examples.