An IRS is an Inertial Reference System  which consists of accelerometers, gyroscopes (laser) and a position computer.

The computer calculates the aircrafts position by direction and velocity sensed by the accelerometers from the initial latitude and longitude input.

An IRS enables the aircraft to fly great circle tracks and to navigate accurately across vast expanses where no ground based navigation aids are available.

35 ft

For Reference:

• 50ft for Class B or A (<15° AoB at take-off or normal landings)

• 35ft for Class A (dry take-off or steep approach)

• 15ft for Class A (wet take-off)

NDB’s are stations emitting a signal. There is nothing for them to be accurate about. ADF's on the other hand, when tuned to an NDB need to be accurate within +/- 5 degrees.

Vmu is the minimum unstick speed.

It is the calibrated airspeed at and above which the airplane can safely lift off the ground and continue the takeoff. Lift-off is not possible prior to reaching this speed.

Vmu is not an operational speed and is established in flight testing only.

No, there is no P-factor (asymmetric blade effect) as on a propeller-driven aircraft.

The Dry Operating Mass (DOM) is the Basic Empty Mass and the Variable Load, also called the Aircraft Prepared for Service (APS) weight.

A line of shortest distance between two points on a sphere.

Always make sure to update yourself with the latest information on these type of questions.

CFM56-7 series with a max takeoff thrust of 27,300lb.

These engines have higher thrust, improved efficiency, and lower maintenance costs than its predecessor, the CFM56-3 series.

180 minutes extended range (ETOPS).

Bypass ratio 5.5:1

Yes, the closer the C.G. is to the rear limit, the less tail down force is required, which means less drag which results in less fuel burn.

To varify the nose gear position (up or down).