A call used to signify that there is an urgency on board a boat, ship, aircraft or other vehicle but that, for the time being at least, there is no immediate danger to anyone's life or to the vessel itself. This is referred to as a state of urgency.

Any of the imaginary lines parallel to the equator and representing degrees of latitude on the earth's surface. Parallels are also used in designating Ports of Entry.

Same as Ramp Fee. Cost assessed by an FBO when an aircraft needs to be parked on the ramp for the day or overnight. Many FBOs will waive parking fees with a minimal amount of fuel purchase.

FAA Part 121- Operating Requirements: Domestic, Flag, and Supplemental Operations. Certificate required for an operator / air carrier to publish scheduled trips (commercial aviation).

FAA Part 135- Operating Requirements: Commuter and On Demand Operations and Rules Governing Persons on Board Such Aircraft. Certificate required for a charter provider to operate as a non scheduled air carrier (i.e. commuter and on-demand charter). It is a set of rules with more stringent standards for commuter and on demand operations.

FAA Part 91- General Operating and Flight Rules. They are the general operating rules for all aircraft. Part 91, Subpart (K), prescribes operating rules for fractional ownership programs.

Aviation Industry shorthand referring to passengers.

Anything that an aircraft carries beyond what is required for its operation during flight, theoretically that from which revenue is derived, such as cargo, passengers, and baggage.

A private jet that is intended for the sole use, or at the discretion of, the owner.

One who operates or is licensed to operate an aircraft in flight.

The pilot responsible for the operation and safety of the aircraft during flight.

A solid cylinder that fits into a larger cylinder and moves under fluid pressure, as in petrol and diesel engines or compresses fluids, as in pumps and compressors.

Piston airplanes have one or more piston-powered engines connected to the propeller(s), which provide thrust to move the aircraft on the ground and through the air. Piston-powered aircraft most commonly use 100 octane low-leaded fuel and fly at altitudes below 15,000 feet. The inside of a typical piston aircraft seats 1-6 passengers is configured similar to the interior of a small car. Piston aircraft used for business typically fly relatively short missions of 300-400 miles, using very small general aviation airports that are often without air traffic control towers. Find Piston Aircraft available for charter flights on the Empty Legs or Transient Aircraft pages of JetRequest.com.

A petrol or diesel engine in which pistons are moved by combustion of fuel, this reciprocating movement producing rotating movement.

1- Of the three axes in flight, this specifies the vertical action, the up-and-down movement. Compare roll and yaw.

2- The angle of a propeller or rotor blade in relation to its arc; also the distance advanced by a blade in one full rotation.

A small tube most often mounted on the outward leading edge of an airplane wing that measures the impact pressure of the air it meets in flight. Named for the French scientist Henri Pitot. Pronounced (pea toe).

Navigation in polar regions, where unique considerations and techniques are applied; no definite limit for these regions is recognized, but polar navigation techniques are usually used from about latitude 70° to the nearest pole, north or south.

Place where one may lawfully enter a country. It typically has a staff of persons who check passports and visas and inspect luggage to assure that contraband is not imported. International airports are usually ports of entry. Ports of entry are responsible for daily port specific operations. Agents enforce the import and export laws and regulations and conduct immigration policy and programs. Ports also perform agriculture inspections to protect the country from potential carriers of animal and plant pests or diseases that could cause serious damage to the native crops, livestock, pets, and the environment. Official ports of entry from different originations are determined by parallels of latitude.

Ferrying aircraft for departure from other than its base airport. Also applies for return flight.

A certified and belted seat located in the lavatory of some aircraft. When chartering a private jet, make sure your desired capacity and seating arrangements coincide with whether or not you or one of your party would mind sitting on the potty seat.

A powered aircraft's source of power, usually either a jet engine or a conventional engine and propeller.

The elevation above a standard datum air-pressure plane. The pressure altitude and indicated altitude are the same when the altimeter is set to 1013 hPa (29.92" Hg US and Canada).

The act of increasing the air pressure inside the aircraft cabin so that it feels normal for the occupants when the outside air pressure decreases.

The occupied portion of an aircraft in which the air pressure has been raised above that of the ambient atmosphere by the compression of the atmosphere into this space.

An airport used by general and private aviation but is not accessible by scheduled airline travel. Find private airports in the Airport Directory of JetRequest.com.

A jet owned by an individual or corporation which is used solely at their discretion. Find private jets available for charter flights on the Empty Legs or Transient Aircraft pages of JetRequest.com.

Aircraft charter for private use. A private jet charter is used to fill mission requirements (business or personal) of the charter client but does not necessarily go above and beyond in luxury and amenities. Find available private jet charter flights on the Empty Legs or Transient Aircraft pages of JetRequest.com.

Refers to an area of airspace within which flight of aircraft is not allowed, usually due to security concerns. It differs from Restricted airspace in which entry is typically forbidden at all times from all aircraft and is not subject to clearance from ATC or the airspace's controlling body.

A machine for propelling an aircraft, consisting of a power-driven shaft with radiating blades that are placed so as to thrust air in a desired direction when spinning.