global positioning system
/l.υb(.)l p.z..(.)n.. s.st.m/ noun a satellite-based navigation system. Abbreviation GPS
globe /l.υb/ noun an object shaped like a ball . If the Earth were a uniform globe, the average temperature would vary only with latitude.
GLONASS noun a system of satellite navigation operated by Russia. Full form Global Orbiting Navigation Sat-ellite System
GMT abbreviation Greenwich Mean
Time GNSS abbreviation global navigation satellite system
go-around /.υ .raυnd/ noun a
climb into the circuit and manoeuvring into position for a new approach and landing . Because the plane was too high on the approach, the pilot executed a go-around.
govern /v(.)n/ verb to control or limit the speed, size or amount of some-thing . The size and number of valves required for a particular type of aircraft is governed by the amount of air neces-sary for pressurisation and air condi-tioning. . The type of undercarriage fit-ted to an aircraft is governed by the operating weight.
governor /v(.)n./ noun a device for controlling or limiting the speed size or amount of something . Overspeed-

gph 106
ing of the engine is prevented by a gov-ernor in the fuel system. . valve
gph /di pi e.t./ abbreviation gal-
lons per hour GPS abbreviation global positioning system
GPWS abbreviation ground proximity warning system
GR abbreviation hail grade /re.d/ noun 1. a position in a scale of size or quality . Kevlar 49 is the grade used in aircraft composites. 2. a mark indicating a student’s level of accomplishment . Students who scored below a particular grade in the exami-nations were not allowed to continue the course.
gradient /re.di.nt/ noun the rate at which a quantity such as temperature or pressure changes relative to change in a given variable, especially distance .
Because there is a temperature gradient across each front it is possible to draw isotherms which reduce in value from warm to cold air. . A pressure gradient occurs aloft from land to sea.
gradual /rdu.l/ adjective hap-
pening slowly but continuously . Loss of cabin pressure may be gradual rather than sudden. . gradual change a change which takes place over a period of time
graduate /rdue.t/ verb 1. to be granted an academic degree or diploma
. She graduated from Oxford Univer-sity with a first class honours degree. 2.
to advance to a new level of skill, achievement, or activity . After 50 hours of flying the single engine trainer, the student pilots graduate to flying the twin engine aircraft. 3. to divide into marked intervals, especially for use in measurement . A thermometer has a scale graduated in degrees Celsius.