chart

Charts and their uses

Charts and their uses

1.

______ is not a position- fixing system

．

A

．

Hifix

B

．

Hyperfix

C

．

Trisponder

D

．

WGS84

2.

A chart projection depicting the poles and a small area on either side of a connecting

meridian

，

that is sometimes used for star charts

，

is the ______

．

A

．

Azimuthal gnomonic projection

B

．

Lambert conformal projection

C

．

Transverse Mercator projection

D

．

Polyconic projection

3.

A polyconic projection is based on a ______

．

A

．

Plane tangent at one point

B

．

Cylinder tangent at one parallel

C

．

Cone tangent at one parallel

D

．

Series of cones tangent at selected parallels

4.

A revised print of a chart is made ______

．

A

．

after every major hydrographic survey of the area covered by the chart

B

．

when there are numerous corrections to be made or the corrections are extensive

C

．

when a low- stock situation occurs and minor corrections are made

D

．

every two years to update the magnetic variation information

5.

Areas enclosed by a long and short dashed magenta line indicate ______

．

A

．

Cable areas

B

．

Dumping grounds

C

．

Fish trap areas

D

．

Precautionary areas

1

Charts and their uses

6.

Chart legends printed in capital letters show that the associated landmark is ______

．

A

．

inconspicuous

B

．

conspicuous

C

．

a government facility or station

D

．

a radio transmitter

7.

Charts should be corrected by using information published in the ______

．

A

．

Light List

B

．

American Practical Navigator

C

．

Notice to Mariners

D

．

Coast Pilot

8.

Charts showing the coast of Mexico are produced by the United States ______

．

A

．

National Geospatial-Intelligence Agency

B

．

Coast Guard

C

．

Naval Observatory

D

．

National Ocean Service

9.

Distance along a track line is measured on a Mercator chart by using the ______

．

A

．

latitude scale near the middle of the track line

B

．

longitude scale near the middle of the track line

C

．

latitude scale at the midlatitude of the chart

D

．

latitude or longitude scale at the middle of the scale

10.

Every chart is liable to be incomplete ______

．

A

．

the final judge of the reliance the mariner can place on the information given

B

．

its immediate importance cannot always be verified before promulgation

C

．

through imperfections in the survey on which it is based

，

or subsequent alterations

to the topography or sea floor

D

．

deferring the promulgation of certain less important information

11.

For what

purpose would using a

Lambert

conformal chart be more convenient than

using a Mercator ________

．

2

Charts and their uses

A

．

Plotting radio bearings over a long distance

B

．

Determining latitude and longitude of a fix

C

．

Measuring rhumb line distances

D

．

Measuring rhumb line directions

12.

Magnetic information on a chart may be ______

．

A

．

found in the ce nter

（

s

）

of the compass rose

（

s

）

B

．

indicated by isogonic lines

C

．

found in a note on the chart

D

．

all of the above

13.

Many of the soundings shown on the chart are derived from ______

．

Undue reliance

should not be placed upon them

．

A

．

Complete and often very poor surveys

B

．

Correct and often very good surveys

C

．

Inadequate and often very old surveys

D

．

Adequate and present surveys

14.

Navigational

charts

are

______

frequent

changes

，

the

important

one

of

which

are

promulgated by Admiralty Notices to Mariners

．

A

．

Published with

B

．

Combined with

C

．

In connection with

D

．

Subject to

15.

On a Mercator chart

，

1 nautical mile is equal to ______

．

A

．

1 minute of longitude

B

．

1 degree of longitude

C

．

1 minute of latitude

D

．

1 degree of latitude

16.

On chart

，

bearings to near objects should be used in preference to objects farther off

，

because ______

．

A

．

a small error in bearing or in laying it down on the chart has a greater effect in

3

Charts and their uses

misplacing the position the longer the line to be drawn

B

．

all scales are kept updated for vital information by Notices to Mariners

C

．

the larger the scale of the chart

，

the greater the detail that can be shown on it

D

．

the

mariner

using

the

medium

scale

charts

for

passage

along

a

coast

need

not

transfer on to a large scale for short distances

17.

Particular

care

is

needed

when

navigating

in

the

vicinity

of

______

as

very

few

of

these features have been fully surveyed to modern standards to determine their correct

position

，

full extent

，

or the least depth over them

．

A

．

SW of Cocos Islands

B

．

oceanic dangers or seamounts

C

．

undiscovered dangers

D

．

the continental shelf

18.

That

the

scale

of

any

part

of

a

chart

to

be

larger

than

the

scale

of

the

survey

is

______

．

A

．

very rare

B

．

common

C

．

often

D

．

reasonable

19.

The arrangement of charts in the catalogue is ______

．

A

．

on a regional basis

B

．

on a national basis

C

．

shown orderly

D

．

appeared from A to W

20.

The broken magenta lines

（

long and short dashes

）

in and around Mobjack Bay indicate

______

．

A

．

Amphibious training areas

B

．

Grounds for dredge spoil

C

．

Fish trap areas

D

．

Gunnery exercise areas

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