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6pack > Intro to Nav > Flashcards

Intro to Nav Flashcards

1
Q

One degree of latitude equals?

A

60nm

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2
Q

One minute of latitude equals?

A

1nm

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3
Q

Most charts used for piloting are?

A

Mercator Projections

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4
Q

A Mercator chart is what kind of projection?

A

Cylindrical

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5
Q

On a Mercator Chart, 1nm is equal to?

A

1 min of latitude

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6
Q

Is the date of the first edition found in the chart title?

A

No

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7
Q

Large scale charts cover?

A

Relatively small areas

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8
Q

Charts covering relatively large areas in generalized details are?

A

small scale charts

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9
Q

The revision date of a chart is printed where?

A

lower left-corner

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10
Q

Chart sounding datum is found?

A

In the chart title

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11
Q

The datum used for soundings on charts of the East Coast of the US is?

A

mean lower low water

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12
Q

Survey info is found?

A

Chart title

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13
Q

Outer ring of the compass rose on a nautical chart?

A

True direction

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14
Q

Inner ring of a compass rose on a nautical chart?

A

magnetic direction

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15
Q

Chart legends printed in capital letters show?

A

That the associated landmark is conspicuous

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16
Q

When slanted letters are used to spell the name of a charted object you know?

A

That the object may cover and uncover with tide

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17
Q

If you’re headed southward along the east coast of the US, you encounter a buoy showing a red flashing light; you should pass this buoy by leaving it to?

A

starboard

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18
Q

Preferred channel buoys indicate the preferred channel to transit by?

A

The color of their top band

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19
Q

Nun buoys?

A

Unlighted, red and green, horizontally banded buoys with the topmost band red and are conical in shape

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20
Q

Are preferred channel buoys numbered?

A

NO

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21
Q

May preferred channel buoys be lettered?

A

yes

22
Q

A lighted buoy with a spherical topmark marks?

A

safe water

23
Q

Can spherical buoys be lettered?

A

yes

24
Q

A safe water daymark?

A

Octagon

25
Q

What does an odd number on a buoy indicate?

A

Should be left to port when entering from seaward

26
Q

Unlighted can buoy may be numbered?

A

Odd

27
Q

Unlighted nun buoy may be numbered?

A

even

28
Q

Red lights may appear on?

A

horizontally banded buoys

29
Q

A vertically stripped buoy may be lighted?

A

with a white light

30
Q

A buoy having red and white vertical stripes has a light characteristic of?

A

Morse (A)

31
Q

Yellow buoy may mark?

A

a fish net area, or an anchorage area

32
Q

Navigational marks used for informational or regulatory purposes are?

A

white with orange geometric shapes

33
Q

A white buoy with an open-faced orange diamond on it indicates?

A

danger

34
Q

A white diamond daymark with an orange border is?

A

an information regulatory mark

35
Q

A white buoy with a blue band is?

A

a mooring buoy

36
Q

A fixed red light signal on a drawbridge indicates?

A

the draw will not be opened immediately

37
Q

Color sectors may indicate?

A

dangerous waters, the best way across a shoal or indicate a turning point in a channel

38
Q

red sector navigation lights warn?

A

mariners of shoals or nearby land

39
Q

On a chart, the characteristic of the light on a lighthouse is shown as flashing white with a red sector, the red sector indicates?

A

Danger area

40
Q

A triangular daymark would be colored?

A

red

41
Q

A square daymark would be colored?

A

green

42
Q

A mid-channel daymark would be colored?

A

red and white

43
Q

Portside daymarks may be numbered?

A

yes

44
Q

A light having characteristics which include color variations is defined as?

A

Alternating

45
Q

A light that has a period shorter than its dark period is described as?

A

flashing

46
Q

A lateral system buoy displaying a quick flashing light indicates?

A

That special caution is required

47
Q

Isophase light?

A

1 sec. Flash, 1 sec. eclipse

48
Q

The intensity of a light is expressed as?

A

The nominal range in the Light List

49
Q

When a buoy is in position only during certain periods of the year the dates of when it is in position are found?

A

In the Light List

50
Q

What info concerning lighted aids to navigation may be read directly from the Light List?

A

location, height above water and luminous range

6pack (17 decks)

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