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OOW 3000 GT Oral Prep > Lights > Flashcards

Lights Flashcards

1
Q

What light is this?
What is its special circumstance?
What is the day shape?
What is the fog signal?

A
  • RAM
    Engaged in undewrwater operations
  • Size unknown
  • End on aspect
    -Could be at anchor
  • Day shapes, diamond ball, vertical line

Fog signal, DELTA -one prolonged follow by two short
at intervals not exceeding 2 minutes

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2
Q

What is this? Day shape? + Fog signal will come up in exam

A

Aground
Port Aspect
Probably over 50m

Day shape = 3 vertical black balls

Sound =
3 distinct strokes of the bell
5s rapid ringing of the bell
3 distinct strokes of the bell

at intervals not exceeding 1 minute

If OVER 100m

Deck lights should be on

3 distinct strokes of the bell
5s rapid ringing of the bell
3 distinct strokes of the bell

followed by 5s sounding of the gong in the aft part of the vessel

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3
Q

All round white light? _______________

A
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4
Q

What is the range of a mast head light on a 40m M/Y?

A

5 Miles

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5
Q

What is the range of a stern light?

A
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6
Q
A

RAM
Towing
greater than 50
exceeds
STBD aspect

Mast arc - 225 deg over the horizon, range 6NM

RULE 24

Day shape

BLACK
ball diamond ball, vertical line

diamond on tow

fog signal?

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7
Q
A

Power driven vessel, towing alongside

fog signal?

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8
Q

What is a masthead light?

A

a white light placed over the fore and aft centreline of the vessel

showing an unbroken light over an arc of the horizon of 225

degrees and so fixed as to show the light from right ahead to 22.5 degrees abaft the beam on eitherside of the vessel.

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9
Q

What is a sidelight?

A

Lights on each side showing an unbroken light over an arc of the horizon of 112.5 degrees

so fixed as to show the light from right ahead to 22.5 degrees abaft the beam on itsrespective side.

Vessel >20 sidelights may be combined in one lantern carried on the fore + aft centreline

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10
Q

what is a Sternlight?

A

a white light placed as nearly as practicable at the stern
showing an unbroken light over an arc of the horizon of 135 degrees and so fixed as
to show the light 67.5 degrees from right aft on each side of the vessel.
(d)

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11
Q

What is a towing light?

A

a yellow light having the same characteristics as the
‘sternlight’ defined in paragraph I of this Rule

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12
Q

What is a All round light?

A

means a light showing an unbroken light over an arc of the
horizon of 360 degrees.

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13
Q

What is a Flashing light ?

A

means a light flashing at regular intervals at a frequency of 120
flashes or more per minute.

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14
Q

What is the
range & arc of a masthead light on a PDV over 50m?

A

Range - 6 miles
Arc- 225 deg

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15
Q

What is the range/arc of sidelights on a PDV over 50m?

A

Range- 3 Miles
Arc- 112.5 deg

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16
Q

What is the range/arc of a sternlight on a PDV over 50m?

A

Range- 3 miles
Arc - 135 deg

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17
Q

A vessel more than 12m in length but less than 50m? Masthead light range?

A

5 miles

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18
Q

What is the range of a vessels sidelights, over 12m and less than 50m?

A

2 miles

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19
Q

There is a certain way to say all lights answers, what is it?

A

1.Type of vessel
2.Length
3.Aspect
4.Special Circumstances
5.Under Way
6.Making Way

20
Q

Correctly answer this?

A

This is a Vessel
Length is Unknown
Aspect - seen from astern
Special circumstances - NUC
Making way

or

She could be a vessel aground, seen from dead ahead, less than 50m

21
Q

What would this be?

A

A PDV
Probably over 50m
STBD aspect
no circumstances
Underway

22
Q

What is this?

A

A PDV
Less than 50m
STBD aspect
no circumstances
Underway

23
Q

What is this?

A

A PDV
Probably over 50m
PORT aspect
no circumstances
Underway

24
Q

What is this?

A

A PDV
probably over 50m
PORT aspect
Air-cushioned vessel when operating in nondisplacement mode
Underway

25
Q

What is this?

A

A PDV
Less than 50m
seen from dead ahead
Seaplane
Underway

26
Q

What is this?

A

A vessel
NUC
Size- Unknown
Seen from dead astern
Circumstance - NUC
Making way

or

A vessel aground
seen from ahead
under 50m

27
Q

What is this?

A

A Vessel
Length- Unknown
Aspect- Unknown
Circumstance - NUC
Underway

No sidelights or stern light therefore underway

Not making way - Underway

28
Q

What is this?

A

A vessel
Size - Unknown (never tell NUC size)
Aspect - Port
Due to exceptional circumstances she is unable to comply with the rules - NUC
Making way

28
Q

What is this?

A

A vessel
Length - Probably over 50m
STBD aspect
Circumstance - RAM
Making way

29
Q

What is this?

A

A vessel
Length - Unknown
Aspect - Unknown
(All round lights)
RAM
Underway

As soon as she has a masthead light or sidelight she is then Making way

30
Q

What is this?

A

A vessel
Length- Probably over 50m
Aspect - PORT
Circumstance - At anchor and RAM

Neither underway or making way

31
Q

What is this?

A

A PDV tug and tow
Length - less than 50m
Aspect - STBD
Circumstance - Towing
Underway

Length of tow - Less than 200m, measured from the stern

32
Q

Can you define the white light on the bottom on the right?

A

This is a masthead light
Arc of Visibility - 225deg
Unbroken light - WHITE

33
Q

WHAT IS THIS?

A

A vessel CBD
Length - Probably over 50m
Seen from STBD Aspect
She is UNDERWAY

+ Day shape = Cylinder

34
Q

What is this candidate?

A

white over red, pilot ahead

A vessel engaged in pilotage duty
You cannot tell the size of a pilot vessel

35
Q

What is this, and what length?

A

This is a pilot vessel at anchor
length = under 50m
Aspect = Pointy end, port

36
Q

What is this?

A

A vessel
engaged in dredging or underwater operations
RAM
Size = Unknown
Clear to pass down the green side

37
Q

What is this?

A

A vessel
Engaged in mine clearance operations
RAM
Under way, possibly making way

you are unable to tell if she is making way

Inform the master, call on the radio to ensure she is clear to pass

38
Q

A vessel NUC

A

A vessel
NUC
Length - Unknown
Aspect - Unknown

39
Q

What is this?

A

A vessel Aground
Length - Probably over 50m
Pointy end - Port Aspect

40
Q

What is this? and what is the aspect?

A

A vessel
At anchor
Length- Probably over 50m
Pointy end - Port aspect

41
Q

What could this be?

(White light)

A

This could be a number of things sir

-The stern of a vessel
-Vessel at anchor under 50m
-Masthead of a PDV coming over horizon
-Life jacket
-Life raft

42
Q

You are going along, and you see these lights out of the STBD window.

A

A PDV engaged in towing
Length - cannot tell from stern
Aspect - Astern

this is indicating i am between the tug and tow

43
Q

What is this?

A

This is a PDV
Probably over 50m
Aspect - Seen from STBD
Engaged in towing
Length of tow exceeds 200m

measured from the stern of the towing vessel to the aft end of the tow

44
Q

What is this?

A

A PDV engaged in towing operations
length - Tow is less than 200m
Tug - less than 50m

45
Q

What is this?

A

A PDV
Engaged in towing operations
Probably over 50m
Length of tow - More than 200m

OOW 3000 GT Oral Prep (23 decks)

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