PHI Inc. is a provider of helicopter transportation services in the Gulf of Mexico. The Company�s engaged in the transportation of personnel and, to a lesser extent, parts and equipment to, from, and among offshore platforms for customers engaged in the oil and gas exploration, development, and production industry, in the Gulf of Mexico. It operates in three business segments: Oil and Gas, Air Medical and Technical Services. The Company owns and operates 278 aircraft domestically and internationally, 168 of which are dedicated to its Oil and Gas segment, 104 of which are dedicated to Air Medical segment, and 6 of which are dedicated to other operations. The Company�s customers include: Shell Oil Company (Shell), BP America Production Company (BP), ExxonMobil Production Co. and ConocoPhillips Company, and ENI Petroleum. Its Air Medical segment operates under the independent provider model and, to a lesser extent, under the traditional provider model.