1. Form Of The Earth

Question 1

What is the great circle?

Answer 1

A circle drawn on the surface of the Earth whose
radius and centre are the same as the Earth’s

Question 2

What is small circle?

Answer 2

A circle drawn on the surface of the Earth whose
radius and centre are not the same as the Earth’s.

Question 3

What is the Equator?

Answer 3

A great circle whose plane is perpendicular to the Earth’s axis of rotation and which divides
the Earth into two equal hemispheres.

Question 4

What is a Meridian?

Answer 4

A semi-great circle joining the poles.
(GMT line – prime meridian)

Question 5

What is a rhumb line?

Answer 5

A regularly curved line on the surface of the Earth that cuts all meridians at the same angle

Question 6

Lat and long measurements

Answer 6

1 minute = 1nm
60 minutes = 1 degree

If 1 minute = 1nm
1 degree = 60 miles

Question 7

Distance conversions

Answer 7

1 nautical mile = 1.852km
1 nautical mile =6080ft (Mile high)
1 statute mile = 5280ft
1 kilometre = 3280ft

Question 8

Conversion factors (5)

Answer 8

Feet to metres x 0.3048
Metres to feet x 3.2808
Nautical miles to kilometres x 1.852
Kilometres to nautical miles x 0.5396
Nautical miles to statute miles x 1.15

Question 9

What are the directions, North (N), South (S), East (E), and West (W) known as?

Answer 9

Cardinal points.

Question 10

What are NE, SE, SW, NW known as?

Answer 10

Quadrantal points.

Question 11

One minute of latitude represents?

Answer 11

1 Nm

Question 12

What does 60 minutes of Latitude represent?

Answer 12

1 degree.

Question 13

What is a Nautical mile?

Answer 13

The distance on the surface of the Earth along a Great Circle which subtends an angle of 1 minute of arc measured at the centre of the Earth

Question 14

What is the circumference of the earth?

Answer 14

1 minute = 1 Nm
60 minutes x 360 degrees = 21,600Nm.

Question 15

What is a Km? A:

Answer 15

1/10,000th of the average distance between the equator and either pole