ATON Aids to Navigation

ATON Aids to Navigation

This is a old test from one of sea school oupv course.

1. Under the US Aids to Navigation System, spherical buoys may be

A. numbered

B. lettered

C. lighted

D. all the above

2. The light rhythm or Morse (A) is shown on

A. preferred channel buoys

B. starboard or port-side buoys

C. special marks

D. safe water buoys

3. When outboard from a U.S. port, a buoy displaying a flashing red light indicates

A. a junction with a preferred channel to the left

B. a sharp turn in the channel to the right

C. the port side of the channel

D. a wreck to be left on the vessel’s starboard side

4. How is the intensity of a light expressed in the Light List?

A. Luminous range

B. Geographic range

C. Nominal range

D. Meteorological range

5. Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks

A. the position of underwater cables

B. a hazard to navigation

C. the port side of the channel

D. safe water

6. Luminous range is the

A. maximum distance at which a light may be seen in clear weather

B. maximum distance at which a light may be seen under existing visibility conditions

C. maximum distance at which a light may be seen considering the height of

the light and the height of the observer

D. the average distance of visibility of the light

7. A daymark used to indicate the safe water in a channel will have the shape indicated by which letter in illustration D045NG

A. A

B. B

C. C

D. D

8. A mooring buoy, if lighted, show which color light

A. Yellew

B. White

C. Blue

D. any color except red or green

9. Repeat of 2

10. What is a lighted safe water mark filled with to aid in its identification?

A. A spherical topmark

B. Red and white retro-reflective material

C. A sequential number

D. A red and white octagon

11. Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic

A. Flashing

B. Quick flashing

C. Composite group flashing

D. Equal interval (isophase)

12 A special purpose buoy shall be

A. lighted with a white light

B. striped black and red

C. lighted with a red light

D. yellow

13 If several fixed navigational lights are visible at the same time, each one may be positively identified by checking all of the following EXCEPT what against the Light List

A. Rhythm

B. Period

C. Intensity

D. Color

14 What is TRUE concerning new editions of Light List

A. Supplements to new editions are issued monthly by the US Coast Guard

B. New editions are published by the National Ocean Survay

C. New editions are corrected through the date shown on the title page

D. None of the above

15 Under the Aids to Navigation System, a yellow buoy is a

A. safe water buoy

B. junction buoy

C. cardinal mark

D. special purpose mark

16 When a dual purpose marking is used, the mariner following the Intracoastal Waterway should be guided by the

A. color of the aid

B. shape of the odd

C. color of the top band

D. shape of the yellow mark

17 A daymark warning of a danger will have the shape indicated by what letter in illustration D045NG

A. A

B. B

C. C

D. D

18 The buoy indicated by the letter A in illustration D044NG is a

A. nun

B. can

C. spar

D. pillar

19 Which of the buoy symbols in illustration D032NG indicates a safe water mark

A. D

B. C

C. B

D. A

20 A lighted buoy to be left to starboard when entering a U.S. port from seaward shall have a

A. white light

B. red light

C. green light

D. light characteristic of Morse (A)

21 A survey (special purpose mark) buoy

A. must be lighted

B. may have a flashing red light

C. may have a fixed white light

D. None of the above

22 Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks

A. the position of underwater cable

B. a hazard to navigation

C. the port side of a channel

D. safe water

23 The period of a lighted aid to navigation refers to the

A. date of construction or establishment

B. length of time between flashes of the light

C. time required for the longest flash of each cycle

D. the time required for the light to complete each cycle

24 A white buoy marked with an orange rectangle indicates

A. mid-channel

B. a fish net area

C. general information

D. an anchorage

25 The Light List indicates that a dayboard is a type NB. You should

A. see a black triangle

B. look for another daymark forming a range

C. except a daymark of no lateral significance

D. check to enter the correct channel at the junction daymark

26 A nun buoy is indicated by which letter in illustration D044NG

A. A

B. B

C. C

D. D

27 What daymark has no lateral significance

A. Red triangle

B. Red and white octagon

C. Green and white diamond

D. Green square

28 Which light characteristic can be used on a special purpose mark

A. Fixed

B. Occulting

C. Equal interval

D. Quick flashing

29 Private aids to navigation in or along navigable waters of the United States may be listed in the

A. Sailing Direction

B. Light List

C. List of Private aids

D. Aids to Navigation Manual

30. Preferred channel buoys indicate the preferred channel to transit by

A. odd or even numbers

B. the color of their top band

C. the location of the buoy in the channel junction

D. the characteristic of the buoy’s light

31. You are outbound in a buoyed channel on course 015 degrees T. You sight a white light showing a Morse (A) characteristic bearing 359 degrees relative .

For safety, you should

A. change course to 359 degrees T to pass near to the buoy

B. stay in the channel and leave the buoy to port

C. alter course to 000 degrees T and leave the buoy well clear to starboard

D. check the chart to see where the marked danger lies in relation to the buoy

32. Geographic range is the maximum distance at which a light may be seen under

A. existing visibility conditions, limited only by the curvature of the Earth

B. perfect visibility conditions, limited only by the curvature of the Earth

C. existing visibility conditions, limited only by the intensity of the light

D. perfect visibility conditions, limited only by interference from background lighting

33. The channel under a bridge is marked with lights of the lateral system.

The bridge piers adjacent to the channel shall be marked with

A. occulting white lights

B. yellow lights

C. fixed white lights

D. flashing blue lights

34. As you enter a channel from seaward in a U.S. port, the numbers on the starboard side buoys

A. decrease and buoys are black

B. increase and the buoys are green

C. decrease and the buoys are red

D. increase and the buoys are red

35. What daymark shape is used in the lateral system?

A. Semicircle

B. Triangle

C. Pentagon

D. Diamond

36. On navigational aids, what does the light characteristic “Fl (2+ 1)” mean?

A. A flashing light combined with a fixed light of greater brightness

B. Light flashes combined in groups, with a different number of flashes in each group

C. A light showing groups of two or more flashes at regular intervals

D. A fixed light varied at regular intervals by groups of two or more flashes of greater brightness

37. Which light characteristic can be used on a special purpose mark?

A. Fixed

B. Occulting

C. Equal interval

D. Quick flashing

38. A Buoy marking a wreck will show a(n)

A. white light FL (2) and a topmark of 2 black spheres

B. occulting green light and may be lettered

C. yellow light and will be numbered

D. continuous quick white light and may be numbered

39. Preferred channel buoys indicate the preferred channel to transit by

A. odd or even numbers

B. the color of their top band

C. the location of the buoy in the channgel junction

D. the characteristic of the buoy’s light

40. In the U.S. Aids to Navigation System, red and green horizontally-banded buoys mark

A. channels for shallow draft vessels

B. general anchorage areas

C. fishing grounds

D. junctions or bifurcations

41. When displayed under a single-span fixed bridge, red lights indicate

A. the channel boundaries

B. that vessels must stop

C. the bridge is about to open

D. the traffic is approaching from the other side

42. A light characteristic of composite group flashing indicates that there is a(n)

A. sharp turn in the channel

B. narrowing in the channel at that point

C. junction in the channel

D. obstruction that must be left to port

43. A drawbridge may use visual signals to acknowledge a vessel’s request to open the draw. Which signal

indicates that the draw will not be open immediately.

A. a flashing amber light

B. a fixed red light

C. a white flag raised and lowered vertically

D. a flashing white light

44. A white diamond daymark with an orange border is a(n)

A. special mark

B. information or regulatory mark

C. lateral aid on the intracoastal waterway

D. safe water mark

45. Which light characteristic can be used on a special purpose mark

A. Fixed

B. occulting

C. equal intervals

D. quick flashing

46. Buoys are marked with reflective material to assist in their detection by searchlight.

Which statement is TRUE?

A. A safe water buoy will display red and white vertical stripes or reflective material

B. All reflective material is white because it is most visible at night

C. A special purpose mark will display either red or green reflective material to agree with its shape

D. A preferred channel buoy displays either red or green reflective material to agree with the top

band of color

47. Duplicate of #34

48. Under the U.S. Aids to Navigation System, a yellow buoy may

A. mark a fishing net area

B. be lighted with a white light

C. show a fixed red light

D. all of the above

49. Which symbol in illustration D015NG would indicate a large automated navigational buoy, such as those

that have replaced some lightship?

A. A

B. B

C. C

D. D

50. The normal range of a light may be accurately defined as the maximum distance at which a light may be

seen.

A. Under existing visibility conditions

B. Under perfect visibility

C. Within ten miles visibility

D. With fifteen miles visibility

51. Some lights used as aids to marine navigation have a red sector to indicate a danger area. How are the

limits of a colored sector of light listed in the Light List?

A. Geographical positions outlining the area of the sector

B. True bearings as observed from the light towards a vessel

C. True bearings as observed from a vessel towards the light

D. Bearings given in the Light List are always magnetic

52. Under the U.S. Aids to Navigation System spherical buoys may be

A. numbered

B. lettered

C. lighted

D. all of the above

53. A special purpose buoy

A. must be lighted

B. may have a flashing red light

C. may have a fixed white light

D. may have a fixed yellow light

54. Which agency maintains federal aids to navigation?

A. Corps of Engineers

B. Coast Guard

C. National Ocean Service

D. Maritime Administration

55. Preferred channel buoys indicate the preferred channel to transit by

A. odd or even numbers

B. the color of their top bands

C. the location of the buoy in the channel junction

D. the characteristic of the buoys light

56. A safe water mark may be

A. vertically striped

B. spherical

C. showing a white light

D. all of the above

57. A vessel’s position should be plotted using bearings of

A. buoys close at hand

B. fixed known objects on shore

C. buoys at a distance

D. all of the above

58. Which symbol represents a twenty-fathom curve?

A. _.._.._.._..