#2 Navigation Stack 31-60

Question 1

What is the range of scale of general charts?

Answer 1

1: 150,000 to 1: 600,000.

Question 2

What are the units of measure for soundings on a nautical chart?

Answer 2

Feet, Fathom, or meters.

Question 3

How is a depth curve indicated on a chart?

Answer 3

By a dotted line indicating the limits of of areas of depth.

Question 4

Which publication would you consult to interpret chart graphic symbology?

Answer 4

Chart No. 1.

Question 5

What is your interpretation of a chart diamond symbol with the abbreviation “Fl 4sec Bell”?

Answer 5

Lighted buoy (white light), flashing period of 4 seconds, with bell sound signal.

Question 6

Which part and volume of the DMA Catalog of Maps, Charts, and Related Products would you consult to find procedures for requisitioning hydrographic charts and publications?

Answer 6

Part 2.

Question 7

What semiannual publication provides DOD activities with a complete listing of available unclassified chart and publication editions?

Answer 7

DMA Hydrographic Bulletin Digest.

Question 8

What publication contains chart allowances for each class of ship?

Answer 8

Pub 1-N-P, Allowance Requirements.

Question 9

What info is noted on Chart Correction Record Cards?

Answer 9

Chart Number, portfolio, edition No. and date, classification, price, latest NTM correction, title of chart.

Question 10

What materials are required to make neat and accurate chart corrections?

Answer 10

High quality black ink pens, a variety of abrasive and non-abrasive erasers, an erasing shield, and a chart correction template.

Question 11

What charts are used for open ocean transits?

Answer 11

Sailing charts (1: 600,000 and smaller).

Question 12

What are the three standard colors for channel marker lights?

Answer 12

Red, Green, and White (if R or G is not indicated, light is white).

Question 13

Which chart numbering category is used to denote chart scales of
1: 9,000,000 and smaller?

Answer 13

Two-digit numbers (10-99).

Question 14

Which chart numbering category includes all nautical charts 1: 2,000,000 and larger scale?

Answer 14

Five-digit numbers (11,000- 99,999).

Question 15

How are combat charts distinguish from general navigational charts?

Answer 15

Combat charts are identified by a five-character alpha-numeric designation, whereas hydrographic charts, are numbered by category. A combat chart’s five-character identifier consists of two digits for region and subregion, a letter for the third character, and two digits which identify the charts geographic sequence within the subregion.

Question 16

What are the four methods of determining the ship’s position?

Answer 16

Piloting, Dead Reckoning, Electronics and Celestial.

Question 17

Why is a continuous navigation plot maintained in CIC?

Answer 17

To supply radar navigation info to the navigator on short notice and serve as a check and balance on the bridge navigation team. To warn the bridge if the ship is standing into danger. To support CIC control and assist functions which depend on accurate navigation, such as ambitious boat control and NGFS.

Question 18

What are three specific reasons for keeping a CIC navigational plot?

Answer 18

Aid in scope interpretation, aid in SAR or MOB, and aid in conversion plotting and NTDS gridlock.

Question 19

How often should DR positions be plotted during open-ocean navigation?

Answer 19

Every 30 minutes - more frequently if ship is maneuvering.

Question 20

What info should be displayed on the CIC Nav Plot to aid in controlling aircraft?

Answer 20

ADIZ, buffer zones and foreign airspace, NAVAID, warning and exclusion or “hot” areas.

Question 21

What is the distance gained toward the original course by the ship when it makes a turn?

Answer 21

Advance.

Question 22

As the ship completes a turn, what is the distance gained at right angles to the original course?

Answer 22

Transfer.

Question 23

What is a ships tactical diameter?

Answer 23

Distance gained at a 180° degree turn, using a constant (standard) rudder angle.

Question 24

What factors should be considered in determining the suitability of using radar bearing to obtain a navigational fix?

Answer 24

Alignment and calibration of the radar, bearing error, pulse width/beam width distortion. Radar bearings should only be used on well-defined navigation points.

Question 25

What is the best method to obtain a navigation fix in CIC?

Answer 25

Two or more radar ranges.

Question 26

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

Answer 26

Set and Drift.

Question 27

From which point is the course and speed to return to desired track determined?

Answer 27

From the second set and drift vector - the anticipated set and drift offset for the next fix interval.

Question 28

Who is responsible for making radar navigation and piloting recommendations to the navigator and evaluating hazards to navigation?

Answer 28

Piloting Officer.

Question 29

Who is responsible for passing timely surface shipping information to CONN and evaluating fog and ROR signals?

Answer 29

Shipping Officer.

Question 30

Which best describes a vessel not under command?

Answer 30

A ship unable to maneuver required by the rules.