The group's principal activity is to provide an integrated range of onshore seismic drilling, permitting, helicopter support and survey services. The group's services are offered to geophysical companies operating in logistically difficult and environmentally sensitive terrain in the United States. The group's primary market is in the marsh, swamp shallow water and contiguous dry land areas along the United States gulf coast. The group owns and operates an extensive fleet of specialized seismic drilling and transportation equipment used in the transition zone. The group also maintains a fleet of helicopters, including an inventory of aviation parts, turbine engines and other miscellaneous flight equipment. On 20-Nov-2003, the group acquired American helicopters inc.