Some systems capture energy from the tides in a vertical direction.

By scanning in vertical direction several images with different focus are gathered.

In the vertical direction, is it not also acting at the bottom face?

Page ordering is the same as books that use vertical direction: from right to left.

The easy axis is assumed to be in the vertical direction.

The vertical directions are indicated by the first and last column.

While moving in a constant vertical direction, the enemy will take every horizontal turn available.

It can simultaneously be read in horizontal and vertical directions.

Therefore movement on the fault is primarily in a vertical direction.

Then comes into action the gravity acceleration with vertical direction.