The turbojet is an airbreathing jet engine, usually used in aircraft. It consists of a gas turbine with a propelling nozzle. The gas turbine has an air inlet, a compressor, a combustion chamber, and a turbine (that drives the compressor). The compressed air from the compressor is heated by the fuel in the combustion chamber and then allowed to expand through the turbine. The turbine exhaust is then expanded in the propelling nozzle where it is accelerated to high speed to provide thrust. Two engineers, Frank Whittle in the United Kingdom and Hans von Ohain in Germany, developed the concept independently into practical engines during the late 1930s.

Turbojets have been replaced in slower aircraft by turboprops because they have better range-specific fuel consumption. At medium speeds, where the propeller is no longer efficient, turboprops have been replaced by turbofans. The turbofan is quieter and has better range-specific fuel consumption than the turbojet. Turbojets are still common in medium range cruise missiles, due to their high exhaust speed, small frontal area, and relative simplicity.

TurboJET is the brand name for the operations of the Hong Kong-headquartered Shun Tak-China Travel Ship Management Limited, which was established from the joint venture between Shun Tak Holdings Limited and China Travel International Investment Hong Kong Limited in July 1999. It operates hydrofoil ferry services in southern China.

It acquired First Ferry (Macau) from New World First Ferry in August 2011.

Shun Tak and China Travel had their own separate ferry business brands before merging as TurboJET, on 1 July 1999. They were Far East Jetfoil by Shun Tak, and Turbo Cat by CTS Parkview Company Ltd.

Routes

TurboJET provides services between Hong Kong, Hong Kong International Airport, Macau, Shenzhen and Guangzhou, all located around the Pearl River Delta in southern China. The route between Hong Kong and Macau is the busiest, operating 24 hours a day, taking approximately one hour to travel the 70 kilometres (43 mi) journey on TurboJET's high speed vessels.

In the past, besides the inter-city routes, Turbo Cat operated Hong Kong out-lying routes during the years 1999 to 2000. The routes were Central to Tuen Mun (on weekdays), and Central to Tai O (on weekends). After the merger, the routes are now operated under the TurboJET brand.