Needs review
Source: Epic Level Handbook

Description: You can track prey across or through the water, or even through the air.

Prerequisites: Epic Level, Track, Knowledge (Nature) (30 ranks), WIS 25, Wilderness Lore (30 ranks)

You can track creatures across water, underwater, or through the air by the minute disturbances they make and traces of their passage. This adds the surfaces of water, underwater, and air to the list of surfaces found under the Track feat in the Player's Handbook.

Table 1-1: Tracking Surface DC

Surface	DC
Surface of Water	60
Underwater	80
Air	120