#1 Navigation Stack 1-30

Question 1

What is the angular distance in degrees, minutes, seconds of arc-north or south of the equator, as measured along the meridian of the point?

Answer 1

Latitude (Parallels).

Question 2

What is the angular distance in degrees, minutes, seconds of arc north or south of the 0 degree meridian, as measured along the parallel of the point?

Answer 2

Longitude (Meridians).

Question 3

What does each digit in the five-digit classification system indicate?

Answer 3

First digit - Region.

Second digit- Geographical/ Subregion.

Last three digit- Geographic order of the chart within the subregion.

Question 4

What is the direction toward which external forces such as wind and current push a vessel?
What is the velocity of these forces?

Answer 4

Set and Drift.

Question 5

What type of scale range of chart is used for inshore navigation, and navigating large inland waterways?

Answer 5

Coastal Charts. 1:50,000 to 1:150,000.

Question 6

What type of navigation system is found on an MCM?

Answer 6

PINS.

Question 7

What is the first number of a combat chart?

Answer 7

8.

Question 8

How often is the Notice to Mariners issued?

Answer 8

Weekly.

Question 9

What Ports are covered in Sailing Directions?

Answer 9

Foreign Ports.

Question 10

What are FLIP Charts?

Answer 10

Aeronautical charts.

Question 11

What ports are covered by Fleet Guides?

Answer 11

U.S. and overseas ports visited by USN ships.

Question 12

How often do you cut a radar fixed when you are within radar landfall?

Answer 12

15 mins.

Question 13

What is the line of demarcation?

Answer 13

Line between Inland and International Rules of the Road.

Question 14

What is the most accurate means of obtaining a radar fix?

Answer 14

2 or more radar ranges.

Question 15

What is the least accurate means of obtaining a radar fix?

Answer 15

Tangent Bearings.

Question 16

In terms of navigational distance, one degree can be divided into how many minutes?

Answer 16

One degree = 60 minutes (60’).

Question 17

What sound powered phone circuit is used by NavLog Keeper at sea and anchor?

Answer 17

JW.

Question 18

Do you log when crossing the Line of Demarcation?

Answer 18

Yes.

Question 19

What scale do you use on the DDRT for Man Overboard?

Answer 19

200: 1.

Question 20

How often must the bearing/range of the man be relayed to the bridge?

Answer 20

15 seconds.

Question 21

What signals does the ship use by day to indicate MOB?

Answer 21

Oscar flag and six short blasts.

Question 22

To DR the man back, what formula do you use?

Answer 22

Double speed, add one zero, and plot on reciprocal courses.

Question 23

What turn is used at night for MOB recovery?

Answer 23

Williamson.

Question 24

What turn is used in restricted waters?

Answer 24

Backing “Y”.

Question 25

What turn do we normally use for MOB recovery?

Answer 25

Anderson.

Question 26

Which scale is ALWAYS used to measure nautical distance on a Mercator Projection chart?

Answer 26

Latitude.

Question 27

In terms of nautical distance, 32’8” of latitude equals how many nautical miles in length?

Answer 27

32.8 NM.

Question 28

Why must the longitude scale NEVER be used to measure nautical distance on a Mercator projection chart?

Answer 28

As the curved surface of the Earth is projected onto a flat surface of the distortion of the longitudinal planes (north- south meridian) occurs.

While the latitude scale also expands on a Mercator Projection chart, the expansion is always exactly equal to the expansion of distance at the same latitude.

Therefore, the latitude scale are always constant, while the longitude scales are distorted.

Question 29

What is the MOST COMMON type of chart used in CIC?

Answer 29

Mercator Projection.

Question 30

What type of chart is used above 80 degrees North or 80 degrees South latitude?

Answer 30

Gnomonic Projection.