Sky Hunter uses an airplane to fly a gridded survey while employing an air sampling device to record hydrocarbon microseep intensities.

The Sky Hunter equipment consists of three computer assisted hydrocarbon measuring devices. These devices are mounted on a small aircraft and flown approximately 100 metres above ground level across the prospective terrain. The flight grid varies in line spacing width based on the detail of sampling required, but maximum line spacing usually is one kilometre. When the field sampling is completed, the raw data is processed by computer and presented in the form of residual anomaly maps, a very similar process to trend surface residual mapping often used in geological subsurface mapping. Each hydrocarbon component is presented on a separate map, which can be crossplotted, or used with other geotechnical data.

The data processing procedure provides a way of recognizing and minimizing the amount of unwanted background "noise" introduced by the physical processes of data gathering. Further, it is designed to provide only anomalous concentrations of various hydrocarbon components, presumably emanating from vertical microseepage, rather than displays of random hydrocarbons commonly present in the atmosphere. The procedure of eliminating background data and unwanted common data employs the use of a baseline cutoff that is consistent throughout the project.

One data channel measures total dry gas and two channels measure rich gas and oil. Combined mapping often results in the ability to distinguish between oil and gas-prone targets.

Schematic showing "all terrain" capability and idealized geochemical profiles over discreet oil and gas pools.