ROR study cards

Question 1

What sound signal is made by a P.D. vessel less than 50 m underway seen end on?

Answer 1

One short blast a/c to stbd

No day signal is required.

Question 2

What sound signal indicates a P.D. vessel less than 50 m is making way?

Answer 2

One prolonged blast

This applies when the vessel is underway.

Question 3

What sound signal indicates a P.D. vessel less than 50 m has stopped?

Answer 3

Two prolonged blasts with 2 seconds interval in between

This is used when the vessel is not making way.

Question 4

What should a P.D. vessel less than 50 m underway seen from the starboard side do?

Answer 4

Maintain course and speed

No day signal is required.

Question 5

What sound signal is made by a P.D. vessel towing or pushing less than 50 m underway?

Answer 5

One short blast a/c to stbd

This is also applicable when seen from port side.

Question 6

What is the sound signal for a P.D. vessel probably 50 m or more at anchor seen from ahead?

Answer 6

One short blast a/c to stbd

A ball in the fore part is displayed.

Question 7

What sound signal should be made by a P.D. vessel seen from astern?

Answer 7

One short blast a/c to stbd

This applies to various types of vessels depending on their size and speed.

Question 8

Fill in the blank: A P.D. vessel less than 12 m, speed not exceeding 7 knots, will sound ______ when seen from the starboard side.

Answer 8

One short blast a/c to stbd

Question 9

What sound signal is made by an air-cushion vessel less than 50 m in non-displacement mode seen end on?

Answer 9

One short blast a/c to stbd

Assumed to be making way.

Question 10

What signal indicates that a P.D. vessel towing probably 50 m or more underway is seen from the starboard side?

Answer 10

Maintain course and speed

One prolonged and two short blasts are sounded.

Question 11

What does a P.D. vessel towing less than 50 m underway sound when seen from the port side?

Answer 11

One short blast a/c to stbd

This is accompanied by sound signals indicating the towing status.

Question 12

What is the sound signal for a P.D. vessel pushing ahead probably 50 m or more underway seen from the starboard side?

Answer 12

One short blast a/c to stbd

No day signal is required.

Question 13

Fill in the blank: A P.D. vessel towing less than 50 m underway with a tow exceeding 200 m seen from port side will sound ______.

Answer 13

One short blast a/c to stbd

Question 14

What sound signal is made by a P.D. vessel towing alongside less than 50 m underway seen end on?

Answer 14

One short blast a/c to stbd

No day signal is required.

Question 15

What sound signal indicates a P.D. vessel towing probably 50 m or more seen from the starboard side?

Answer 15

Maintain course and speed

One prolonged and two short blasts are sounded.

Question 16

What signal is used by a P.D. vessel towing probably 50 m or more underway seen from astern?

Answer 16

One short blast a/c to stbd

This applies if the tow exceeds 200 m.

Question 17

What is the sound signal for a P.D. vessel towing less than 50 m underway with tow 200 m or less seen from the starboard side?

Answer 17

Maintain course and speed

Towing vessels will sound one prolonged and two short blasts.

Question 18

What sound signal is made by a P.D. vessel towing probably 50 m or more underway with tow exceeding 200 m seen from port side?

Answer 18

One short blast a/c to stbd

This is accompanied by a diamond signal.

Question 19

What does a P.D. vessel pushing ahead less than 50 m underway seen from the starboard side sound?

Answer 19

One prolonged and two short blasts

No day signal is required.

Question 20

What sound signal is made by a P.D. vessel towing less than 50 m underway seen end on?

Answer 20

One short blast a/c to stbd

No day signal is required.

Question 21

What is the sound signal for a P.D. vessel towing probably 50 m or more underway seen from the starboard side?

Answer 21

One prolonged and two short blasts

This applies when the tow exceeds 200 m.

Question 22

Fill in the blank: A P.D. vessel towing less than 50 m underway with tow 200 m or less seen from port side will sound ______.

Answer 22

One short blast a/c to stbd

Question 23

What sound signal is made by a P.D. vessel pushing ahead probably 50 m or more underway seen from the starboard side?

Answer 23

One short blast a/c to stbd

No day signal is required.

Question 24

What sound signal is given by a vessel towing alongside less than 50 m underway seen end on?

Answer 24

One short blast a/c to stbd, one prolonged and two short blasts.

Question 25

What signal is used for a vessel towing alongside probably 50 m. or more underway seen end on?

Answer 25

One short blast a/c to stbd, one prolonged and two short blasts.

Question 26

What is the signal for an inconspicuous partly submerged vessel or object towed, with breadth less than 25 m. and length 100 m. or less?

Answer 26

Action according to position of tug, one diamond at or near aftermost extremity of last v/I or object, no fog signal.

Question 27

What is the signal for an inconspicuous partly submerged vessel or object towed, with length 200 m. or less?

Answer 27

Action according to position of tug, one diamond at or near aftermost extremity of last v/I or object, no fog signal.

Question 28

What sound signal is given by a sailing vessel underway seen end on?

Answer 28

One short blast a/c to stbd, one prolonged and two short blasts.

Question 29

What is the signal for a sailing vessel underway seen from the stbd side?

Answer 29

Two short blasts a/c to port, one prolonged and two short blasts.

Question 30

What signal is given for a sailing vessel probably 20 m or more underway seen from port side?

Answer 30

One short blast a/c to stbd, one prolonged and two short blasts.

Question 31

What sound signal is given by a trawler less than 50 m. making way seen end on?

Answer 31

One short blast a/c to stbd, two cones with apexes together in vertical line, one prolonged and two short blasts.

Question 32

What is the signal for a trawler making way seen from the stbd side?

Answer 32

Two short blasts a/c to port, two cones with apexes together in vertical line, one prolonged and two short blasts.

Question 33

What is the signal for a fishing vessel other than trawler making way, gear extending 150 m. or less, seen end on?

Answer 33

One short blast a/c to stbd, two cones with apexes together in vertical line, one prolonged and two short blasts.

Question 34

What is the signal for a fishing vessel other than trawler making way, gear extending more than 150 m., seen from astern?

Answer 34

Two short blasts a/c to port, two cones with apexes together in vertical line, also a cone with apex upwards in direction of gear, one prolonged and two short blasts.

Question 35

What sound signal is given by a trawler probably 50 m. or more making way hauling nets seen from port side?

Answer 35

One short blast a/c to stbd, two cones with apexes together in vertical line, also flag G, one prolonged and two short blasts.

Question 36

What is the signal for a trawler probably 50 m. or more underway but stopped or at anchor, hauling nets?

Answer 36

Two short blasts a/c to port, two cones with apexes together in vertical line, also flag G, one prolonged and two short blasts.

Question 37

Fill in the blank: A trawler making way shooting nets seen from stbd side gives _____.

Answer 37

Two short blasts a/c to port, two cones with apexes together in vertical line, also flag Z, one prolonged and two short blasts.

Question 38

What is the signal for a fishing vessel other than trawler making way, gear extending more than 150 m., seen from port side?

Answer 38

One short blast a/c to stbd, two cones with apexes together in vertical line, also a cone with apex upwards in direction of gear, one prolonged and two short blasts.

Question 39

What sound signal is given by a trawler less than 50 m. making way seen from astern?

Answer 39

One short blast a/c to stbd, two cones with apexes together in vertical line, one prolonged and two short blasts.

Question 40

What is the signal for a trawler underway but stopped or at anchor, nets fast on an obstruction?

Answer 40

One short blast a/c to stbd, two cones with apexes together in vertical line, one prolonged and two short blasts.

Question 41

What flag indicates a trawler that is probably 50 m or more underway but stopped or at anchor, hauling nets?

Answer 41

Flag G ## Footnote A trawler's status can be identified by its flag and sound signals.

Question 42

What sound signal corresponds to a trawler probably 50 m or more underway but stopped or at anchor, hauling nets, seen from the starboard side?

Answer 42

Two short blasts a/c to port

Question 43

What visual signal indicates a trawler probably 50 m or more making way, shooting nets, seen from the starboard side?

Answer 43

Two cones with apexes together in vertical line, also flag Z

Question 44

What sound signal does a trawler making way, hauling nets, seen from the port side sound?

Answer 44

One short blast a/c to starboard

Question 45

What visual signal is displayed by a trawler making way, shooting nets, seen from astern?

Answer 45

Two cones with apexes together in vertical line, also flag Z

Question 46

What visual signal indicates a fishing vessel other than a trawler using purse seine gear extending 150 m or less, making way seen from the starboard side?

Answer 46

Two cones with apexes together in vertical line

Question 47

What sound signal does a fishing vessel using purse seine gear extending more than 150 m sound when making way seen from astern?

Answer 47

One short blast a/c to starboard

Question 48

Fill in the blank: A vessel not under command (N.U.C.) making way seen from the port side sounds _____

Answer 48

Two short blasts a/c to port

Question 49

What visual signal indicates an N.U.C. vessel making way seen from the starboard side?

Answer 49

Two balls in vertical line

Question 50

What sound signal does a vessel R.A.M. or dredger without obstruction less than 50 m making way seen end on sound?

Answer 50

One short blast a/c to starboard

Question 51

What visual signal indicates a vessel R.A.M. or dredger without obstruction, probably 50 m or more making way seen from starboard side?

Answer 51

Ball, diamond and ball in vertical line

Question 52

How many balls are displayed in a vertical line by a vessel less than 50 m at anchor?

Answer 52

Two balls in vertical line

Question 53

What sound signal does a vessel less than 50 m at anchor sound?

Answer 53

One prolonged and two short blasts

Question 54

What is the sound signal for a fishing vessel other than a trawler using purse seine gear extending more than 150 m seen from astern?

Answer 54

Two short blasts a/c to port

Question 55

True or False: Aground vessels less than 50 m must sound three strokes on a bell before and after signaling.

Answer 55

True

Question 56

Fill in the blank: A vessel R.A.M. less than 50 m making way seen from astern shows _____ in vertical line.

Answer 56

Ball, diamond and ball

Question 57

What visual signal indicates a vessel towing less than 50 m underway, towing 200 m or less seen from the starboard side?

Answer 57

Ball, diamond and ball in vertical line

Question 58

What sound signal indicates a vessel towing less than 50 m. underway with a tow of 200 m. or less seen from the starboard side?

Answer 58

One prolonged and two short blasts. ## Footnote This signal is used to indicate the presence of a vessel engaged in towing operations.

Question 59

What sound signal is used when a vessel towing less than 50 m. is seen from the port side?

Answer 59

One short blast a/c to starboard. ## Footnote This signal helps other vessels understand the maneuvering intentions of the towing vessel.

Question 60

What shape indicates a vessel that is towing with a tow exceeding 200 m.?

Answer 60

Ball, diamond and ball in vertical line, and a diamond if the tow exceeds 200 m. ## Footnote The diamond shape signifies the length of the tow in conjunction with other shapes.

Question 61

What sound signal is used when a vessel towing probably 50 m. or more is seen from the starboard side?

Answer 61

Two short blasts a/c to port. ## Footnote This signal is crucial for safe navigation and communication between vessels.

Question 62

What visual signal is used for a dredger less than 50 m. with an obstruction on the starboard side?

Answer 62

Two diamonds in vertical line on the safe side and two balls in vertical line on the obstruction side. ## Footnote This visual indication helps other vessels identify the dredging operation and its safe passage area.

Question 63

Fill in the blank: A mine clearance vessel less than 50 m. underway seen end on uses _______.

Answer 63

One short blast a/c to starboard and pass more than 1000 m. ## Footnote This ensures that vessels maintain a safe distance from the mine clearance operation.

Question 64

What sound signal does a mine clearance vessel less than 50 m. underway seen from the starboard side use?

Answer 64

Two short blasts a/c to port. ## Footnote This signal alerts other vessels to the mine clearance operation and its location.

Question 65

What shape signifies a vessel that is a C.B.D. less than 50 m. underway?

Answer 65

A Cylinder. ## Footnote The cylinder shape is part of the visual signals used to indicate the status of the vessel.

Question 66

True or False: A dredger R.A.M. with obstruction on the port side making way seen from astern uses one short blast a/c to starboard.

Answer 66

True. ## Footnote This signal is critical for ensuring safety when navigating around a dredger.

Question 67

What is the sound signal for a dredger R.A.M. with obstruction on the starboard side making way seen from astern?

Answer 67

Two short blasts a/c to port. ## Footnote This helps other vessels to understand the maneuvering intentions of the dredger.

Question 68

What does the signal 'One prolonged and two short blasts' commonly indicate?

Answer 68

It is a standard signal for vessels indicating their presence and maneuvers. ## Footnote This sound signal is used in various scenarios to communicate intentions to other vessels.

Question 69

What visual signal is used for a dredger R.A.M. with obstruction while making way?

Answer 69

Ball, diamond and ball in vertical line with additional shapes depending on the location of the obstruction. ## Footnote These shapes provide crucial information about the vessel's status and surrounding hazards.

Question 70

What does one short blast a/c to stbd indicate when seen from stbd side?

Answer 70

It indicates a vessel underway or a cylinder.

Question 71

What signal is used when a pilot vessel is underway seen end on?

Answer 71

One short blast a/c to stbd.

Question 72

How is a pilot vessel making way indicated?

Answer 72

One prolonged blast.

Question 73

What does two prolonged blasts with a 2 seconds interval indicate?

Answer 73

The vessel is stopped.

Question 74

What additional signal can be sounded for a pilot vessel?

Answer 74

Four short blasts may be sounded.

Question 75

What is indicated by a ball in the fore part of a pilot vessel at anchor?

Answer 75

It is a signal as per International Code of Signals.

Question 76

How is a vessel at anchor indicated when it is less than 100 m?

Answer 76

Rapid ringing of bell for 5 secs.

Question 77

What is the signal for a vessel aground seen from port side?

Answer 77

One short blast a/c to stbd, reverse course and inform Master.

Question 78

What does three balls in a vertical line signify?

Answer 78

Aground vessel.

Question 79

What signal is used for a vessel towing with a tow length > 200 m seen from stbd side?

Answer 79

Two short blasts a/c to port.

Question 80

What is the indication for a fishing vessel with nets extending < 150 m?

Answer 80

Two short blasts a/c to port.

Question 81

What light arrangement is required for a vessel RAM at anchor seen from port side?

Answer 81

All round white and red lights in vertical line.

Question 82

What does the signal of one short blast a/c to stbd indicate for a vessel engaged in diving operations?

Answer 82

It indicates the vessel is to be passed at a safe distance.

Question 83

Fill in the blank: A vessel constrained by draught is indicated by one short blast a/c to ______.

Answer 83

stbd

Question 84

True or False: A vessel NUC underway seen from stbd side gives two short blasts a/c to port.

Answer 84

True

Question 85

What does the signal of one prolonged and two short blasts indicate?

Answer 85

Making way for a vessel.

Question 86

What signal is given for a vessel engaged in mine clearance operation seen from port side?

Answer 86

One short blast a/c to stbd.

Question 87

What does four short blasts signify for a pilot vessel?

Answer 87

It is an optional additional signal.

Question 88

What lighting is required for a vessel length < 50 m regarding masthead lights?

Answer 88

Aft masthead light is not compulsory.

Question 89

What is indicated by a rapid ringing of the bell for 5 seconds?

Answer 89

A vessel at anchor less than 100 m.

Question 90

What does a yellow towing light above the stern indicate?

Answer 90

It indicates a vessel that is towing.

Question 91

What is the signal for a vessel to reverse course and inform the Master?

Answer 91

One short blast, a/c to stbd

Question 92

What does two all-round red lights indicate?

Answer 92

It is in vertical line

Question 93

What type of light is not compulsory for vessels less than 50 m in length?

Answer 93

White light at stern

Question 94

What is the sound signal for a vessel less than 100 m in length?

Answer 94

Rapid ringing of bell for five seconds

Question 95

What additional sound signal is required for a vessel greater than 100 m in length?

Answer 95

Rapid ringing of gong aft for five seconds

Question 96

What optional whistle signal can be used?

Answer 96

Two short and one prolonged blasts

Question 97

What is the signal for a trawler underway shooting nets seen from the starboard side?

Answer 97

Two short blasts, a/c to port

Question 98

What lights are displayed by a trawler underway shooting nets?

Answer 98

All round green, white in vertical line

Question 99

What does the masthead light indicate when it is abaft of and higher than the green light?

Answer 99

Making way - side and stern lights

Question 100

What is the signal for a trawler underway or at anchor hauling nets seen from the port side?

Answer 100

One short blast, a/c to stbd

Question 101

What lights does a trawler display when hauling nets?

Answer 101

All round green over white in vertical line

Question 102

What is the signal for two trawlers engaged in pair trawling when seen end on from ahead or astern?

Answer 102

One short blast, a/c to stbd

Question 103

What lights are displayed by two trawlers engaged in pair trawling?

Answer 103

All round green over white in vertical line

Question 104

What does the search light indicate when directed forward towards the other trawler?

Answer 104

Search light directed forward

Question 105

What is the signal for two trawlers passing well clear when seen end on?

Answer 105

One short blast, a/c to stbd

Question 106

What abbreviation stands for 'Power driven'?

Answer 106

P.D.

Question 107

What does 'stbd' stand for?

Answer 107

Starboard

Question 108

What does the abbreviation 'N.U.C.' mean?

Answer 108

Not under Command

Question 109

What does 'R.A.M.' stand for?

Answer 109

Restricted in ability to manoeuvre

Question 110

What does 'C.B.D.' indicate?

Answer 110

Constrained by draught

Question 111

Fill in the blank: Length < 50 m - masthead light not _______.

Answer 111

compulsory

Question 112

Fill in the blank: All round _______ over red lights in vertical line at tower level.

Answer 112

white

Question 113

What does 'It.' stand for in the context of lights?

Answer 113

Light