NAV Review 1

Small Circle

a regularly curved line on the surface of the earth cutting all meridians at the same angle. Thus the rhumb line is not the shortest distance between two points. Advantage is that its direction is constant.

Mercator

+/- 2 minutes

1nm or 1000ft

As directed by ATC or published in the AIP.

Towards East

• Variation West, Magnetic Best
• Variation East, Magnetic Least

Great Circle

Mercator

Angles are correctly represented everywhere on the sheet.

• Work from required GS = 120KIAS
• Subtract TAS to give IAS for 120. Eg 2000 ft, IAS will be 116.
• Work in head/tailwind calc. eg 10 kt headwind: IAS of 126 for a GS of 120.

The direction in which an observer would have to move in order to reach the North Pole.

• Low as practicable
• RPM to 1800
• MAP to 18'
• Lean to RR+5lph

• 1000ft cloud base
• 5KM vis

5KM vis, Clear of cloud and in sight of the ground.

70LPH

• Parallelogram - No time loss
• Triangle - Time loss IAW deviation angle
• Cut corners - Time gain

Point to point nav is the technique used to fly from a point on one radial of a VOR to another point on another radial of the same VOR without having to arc or fly overhead the aid. The principle of point to point is using the HSI/RMI as a circular map presentation.