If the two pauses are at equal distances, that means all the distances traveled between the pauses are the same. She starts at the surface and goes a third of the way down. This is the first pause. Then she goes another third of the way and pauses at the two-thirds mark. Then she reaches 88.5 feet.
So pause 1 is at 88.5/3 = 29.5 feet below the surface
And pause two is at 88.5/3*2 = 59 feet below the surface.
