Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Oscar’s OOW > Colregs - Lights & Shapes > Flashcards

Colregs - Lights & Shapes Flashcards

1
Q

When should lights be exhibited?

A

Sunset to sunrise

&

Sunrise to sunset In restricted visibility

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

When should shapes be exhibited?

A

By day (sunrise to sunset)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

The lights & shapes specified in these rules shall comply with the provisions of annex _____ to these regulations.

A

Annex 1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the arc of a masthead light?

A

225°

From right ahead to 22.5° abaft the beam on either side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the arc of sidelights?

A

112.5°

From right ahead to 22.5° abaft the beam on its respective side

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What length of vessel may combine sidelights in one lantern?

A

< 20m

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the arc of a stern light?

A

135°

67.5° from right aft on each side of the vessel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What colour is the stern light?

A

White

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What colour is the masthead light?

A

White

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What colour is the starboard side light?

A

Green

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What colour is the port side light?

A

Red

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What light has the same characteristics as a stern light?

A

Towing light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the arc of a towing light

A

135°

67.5° from right aft on each side of the vessel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What colour is a towing light

A

White

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is an “all round light”?

A

An unbroken light over the arc of the horizon of 365°

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the frequency of a “flashing light”?

A

120 flashes or more per minute

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is the range of a masthead light for vessels >50m?

A

6 miles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is the range of a side light for vessels >50m?

A

3 miles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is the range of a stern light for vessels >50m?

A

3 miles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is the range of a towing light for vessels >50m?

A

3 miles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What is the range of a white, red green or yellow all round light for vessels >50m?

A

3 miles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What is the range of a masthead light for vessels < 20m

A

3 miles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is the range of a masthead light for vessels 20m < 50m

24
Q

What is the range of a side light for vessels 12m < 50m?

25
Q

What is the range of a stern light for vessels 12m < 50m?

26
Q

What is the range of a towing light for vessels 12m < 50m?

27
Q

What is the range of a white, red, green or yellow all round light light for vessels 12m < 50m?

28
Q

What is the range of a masthead light for vessels < 12m?

29
Q

What is the range of a side light for vessels < 12m?

30
Q

What is the range of a stern light for vessels < 12m?

31
Q

What is the range of a towing light for vessels < 12m?

32
Q

What is the range of a white, red, green or yellow all round light for vessels < 12m?

33
Q

What is the range of an all round white light on a partially submerged vessel or object being towed?

34
Q

What lights should a power driven vessel underway exhibit?

A

Masthead light forward

2nd masthead light abaft and higher than the forward one (optional if <50m; mandatory >50m)

Sidelights

Stern light

35
Q

What lights shall an air-cushioned craft in non-displacement (hovercraft) mode exhibit?

A

All round flashing yellow light

AND SAME AS PDV UNDERWAY

Masthead light forward

2nd masthead light abaft and higher than the forward one (optional if <50m; mandatory >50m)

Sidelights

Stern light

36
Q

What lights shall a WIG craft exhibit only when taking off, landing and in flight near the surface?

A

High intensity all round flashing red light

AND SAME AS PDV UNDERWAY

Masthead light forward

2nd masthead light abaft and higher than the forward one (optional if <50m; mandatory >50m)

Sidelights

Stern light

37
Q

What lights shall a PDV <12m exhibit?

A

All round white light

&

sidelights

38
Q

What lights shall a PDV <7m and <7kts exhibit?

A

All round white light

&

sidelights (if practicable)

39
Q

What lights shall a PDV towing (length of tow <200m) exhibit?

A

2 masthead lights in a vertical line

Sidelights

Stern light

Towing light in a vertical line above the stern light

40
Q

What lights shall a PDV towing (length of tow >200m) exhibit?

A

3 masthead lights in a vertical line

Sidelights

Stern light

Towing light in a vertical line above the stern light

41
Q

What shapes shall a PDV towing (length of tow >200m) exhibit?

A

A diamond shape where it can best be seen

42
Q

What shapes shall a PDV towing (length of tow <200m) exhibit?

43
Q

When a pushing vessel and a vessel being pushed ahead are rigidly connected in a composite unit what lights should they exhibit?

A

They shall be regarded as a PDV and exhibit the lights prescribed in rule 23

44
Q

What lights should a PDV exhibit when pushing ahead or towing alongside but NOT a composite unit?

A

2 masthead lights in a vertical line

Sidelights

Stern light

45
Q

Does Rule 23.a.ii (2nd masthead light for vessels >50m apply to towing vessels?

46
Q

What lights should a vessel or object being towed (other than inconspicuous / partly submerged) exhibit?

A

Sidelights

Stern light

47
Q

What shapes should a vessel or object being towed (other than inconspicuous / partly submerged) exhibit when length of tow >200m?

A

A diamond shape where it can best be seen

48
Q

What shapes should a vessel or object being towed (other than inconspicuous / partly submerged) exhibit when length of tow <200m?

49
Q

What lights should a vessel being pushed ahead (not part of a composite unit) exhibit at the forward end?

A

Sidelights

50
Q

What lights shall a vessel being towed alongside exhibit?

A

Stern light

Sidelights (at the forward end)

51
Q

What lights shall an inconspicuous or partly submerged vessel or object or combination of such vessels or objects being towed exhibit if they are less than 25m in breadth?

A

One all round white light at or near the forward end (not for dracones)

One all round white light at or near the after end

52
Q

What lights shall an inconspicuous or partly submerged vessel or object or combination of such vessels or objects being towed exhibit if they are 25m or more in breadth?

A

One all round white light at or near the forward end (not for dracones)

One all round white light at or near the after end

Two additional all round white lights at or near the extremities of its breadth.

53
Q

What lights shall an inconspicuous or partly submerged vessel or object or combination of such vessels or objects being towed exhibit if they are 25m or more in breadth and >100 m?

A

One all round white light at or near the forward end (not for dracones)

One all round white light at or near the after end

Two additional all round white lights at or near the extremities of its breadth.

Additional all round white lights between the fore/aft and breadth lights so that the distance between the lights shall not exceed 100m

54
Q

What shapes shall an inconspicuous or partly submerged vessel or object or combination of such vessels or objects being towed exhibit if the length of tow exceeds 200m?

A

A diamond where it can best be seen and as far forward as practicable

55
Q

If it is impracticable to light a vessel or object being towed what should be done?

A

All possible measures should be taken to light the vessel or object towed or at least to indicate the presence of such vessel or object

Oscar’s OOW (26 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions