Navigation & Piloting

Question 0

Define Dead Reckoning:

Answer 0

Process of navigation by advancing a known position using course, speed, time, and distance to be traveled.

Question 1

Define Piloting:

Answer 1

Movement of a vessel by referring to landmarks, aids to navigation, depth sounding, and radionavigation.

Question 2

A dead reckoning plot should be maintained at all times: T or F

Answer 2

True, it is the best estimate of where the vessel should be at any given time.

Question 3

A dead reckoning plot provides a visual cue if the vessel is steering towards danger: T or F

Answer 3

True

Question 4

What is a great circle?

Answer 4

A geometric plane passing through the center of the earth which divides the earth into two equal parts.

Question 5

A great circle always passes through the center of the earth: T or F

Answer 5

True

Question 6

What is a small circle?

Answer 6

A geometric plane anywhere on earth that does not pass the earth’s center.

Question 7

Small circles always have smaller diameters than the earth: T or F

Answer 7

True

Question 8

What is the term for an object that is not perfectly round but slightly fatter in the middle?

Answer 8

Oblate spheroid

The earth actually flattens due to its rotation.

Question 9

For the purposes of navigation we assume the_________is perfectly round.

Answer 9

Earth

Question 10

Marine navigation is based on a _____________ that are used to describe a _______________. It is called the ______________.

Answer 10

System of geographic coordinates,specific location on a body of water. Latitude longitude system.

Question 11

Parallels of _________ are small _________ that are parallel to each other, and to the _________.

Answer 11

Latitude,circles,equator

They are measured north or south of the equator , up to 90 degrees at the pole. The equator is 0 degrees.

Question 12

One nautical mile equals_________ or _________statute miles.

Answer 12

6,076 feet or 1.15

Question 13

The distance between lines of latitude remains constant. Each one of these minutes of latitude is equal to one nautical mile. T or F

Answer 13

True

Question 14

The Prime _________ is represented as _____ longitude.

Answer 14

Meridian, 0 degree

Question 15

__________ north is different from _________ north. The inference between them is called_____________.

Answer 15

True, magnetic, Variation.

Question 16

A compass rose is used to determine __________ and _________ direction.

Answer 16

Course and bearing

Question 17

The outer circle of the compass rose represents__________ and the inner ring represents _____________ and _____________.

Answer 17

True north, magnetic bearings,direction.

Question 18

Distance is measured on nautical charts with a tool called dividers and the latitude scale on the side of the chart: T or F

Answer 18

True

Question 19

The type of projection most commonly used in coastal navigation is the ___________.

Answer 19

Mercator projection

Question 20

1 degree of latitude everywhere on the earths surface is equal to ______ nautical miles. 1 degree of _________ will vary with they latitude.

Answer 20

60, longitude

Question 21

Define navigation:

Answer 21

The process of directing the movement of a craft from one place to another.

Question 22

Safe and confident navigation of a vessel is an absolute necessity and adequate preparation is very important to safe navigation. T or F

Answer 22

True

Question 23

Instruments used for chart work to transfer directions from a compass rose to various plotted courses and lines of bearings.

Answer 23

Parallel Rulers

Question 24

A rolling plotter may be used for chart work instead of the parallel ruler. T or F

Answer 24

True.
** The bull’s eye is used to line up on a longitude line so that the direction can be plotted or read directly from the scale without having to roll it to a compass rose**

Question 25

____________ are used to measure distance on a scale and transfer them to a chart.

Answer 25

Dividers

Question 26

___________ is an instrument similar to dividers and is best used for plotting range and distance.

Answer 26

Drafting compass

Question 27

The ____________________ is a device that is used to make quick and easy time, speed, and distance calculations in navigation.

Answer 27

Navigation slide rule

Question 28

When describing latitude and longitude, the ___________is always given first.

Answer 28

Latitude.

Question 29

By definition, an ______________ is “any device external to a vessel or aircraft intended to assist a navigator to determine position or safe course, or to warn of dangers or obstruction to navigation”.

Answer 29

ATON- aid to navigation