Final Exam

Question 1

________ is a vertical movement of water.

Answer 1

Tide

Question 2

__________ is a horizontal movement of water.

Answer 2

Current

Question 3

What is a current that is frequently caused by a tide called?

Answer 3

Tidal Current

Question 4

The terms “rise” and “fall” are used to describe what?

Answer 4

A tide

Question 5

The terms “ebb” and “flood” are used to describe what?

Answer 5

A tidal current

Question 6

The direction a current flows is called its ________.

Answer 6

Set

Question 7

The speed of a current is called its what?

Answer 7

Drift

Question 8

A term used for times when there is little or no current is?

Answer 8

“Slack water”

Question 9

Having a period or cycle of approximately one tidal day is termed?

Answer 9

Diurnal

Question 10

_________ means having a cycle of approximately one-half of a tidal day.

Answer 10

Semi-diurnal

Question 11

The difference in speed between two flood or ebb currents is called?

Answer 11

Diurnal inequality

Question 12

A current in a channel that is caused by a difference in the surface level at the two ends of the channel:

Answer 12

Hydraulic current

Question 13

The period of time at high or low water when there is no perceptible change in the height of the tide is termed?

Answer 13

The stand of the tide

Question 14

A ________ tide is a combination of both a diurnal and semi-diurnal tide.

Answer 14

Mixed tide

Question 15

What is the term for the compass positioned on the flying bridge of a ship?

Answer 15

A standard compass

Question 16

What is the compass located in the wheelhouse of a ship called?

Answer 16

A steering compass

Question 17

The line etched into the forward side of the compass bowl that indicates the heading of the ship is called?

Answer 17

A Lubber’s Line

Question 18

___________ is the difference between true north and magnetic north.

Answer 18

Variation

Question 19

___________ is the difference between magnetic north and the direction indicated by the north point of the compass.

Answer 19

Deviation

Question 20

What are the metal sphere’s located at the sides of the binnacle called and what are they used for?

Answer 20

Quadrantal spheres. They are adjusted to compensate for deviation.

Question 21

__________ magnetism is present in a material only while the material is under the influence of an external magnetic field.

Answer 21

Induced magnetism

Question 22

__________ magnetism is the magnetism that remains in the material after the external magnetic field is removed.

Answer 22

Residual magnetism

Question 23

__________ magnetism is magnetism that is retained for long periods of time without any appreciable reduction.

Answer 23

Permanent magnetism

Question 24

_________ Sailing assumes the Earth is flat and can be used to solve for course, distance, difference of latitude, and departure but not for longitude.

Answer 24

Plane Sailing

Question 25

_________ Sailing was used before the invention of chronometers to solve for longitude.

Answer 25

Parallel Sailing

Question 26

A __________ is drawn through the point “A” when doing a Sailing problem to form part of the triangle.

Answer 26

Meridian

Question 27

A ___________ is drawn through the point “B” when doing a Sailing problem to form part of the triangle.

Answer 27

Parallel

Question 28

What are the formula for Parallel Sailing?

Answer 28

Dlo = p (sec L)

p = Dlo (cos L)

Question 29

Sine =

Answer 29

Hypotenus

Question 30

Cos =

Answer 30

Hypotenus

Question 31

Tan =

Answer 31

Adjacent

Question 32

Secant =

Answer 32

Adjacent

Question 33

Cosecant =

Answer 33

Opposite

Question 34

Cotangent =

Answer 34

Opposite