7 - Traffic rules at sea Flashcards
5 parts of the ROR
general rules steering and sailing rules lights and shapes sounds and light signals exemptions
example of vessel restricted in ability to manoeuvre?
vessel engaged in cable or pipe laying, dredging, surveying or underwater operations
what is excluded from the term “vessel engaged in fishing”
vessels fishing with trolling lines or other apparatus which does not restrict manoeuvrability
what does “safe speed” mean?
speed at which a vessel can take proper and effective action to avoid collision
how does one approach a bend in a narrow channel
keep to the starboard side of the channel, approach with one long blast on horn
who has right of way in a narrow channel
small boat (<20m) give way to big boat,
how does one join a traffic separation scheme lane?
at as small an angle as possible to the general direction of the traffic flow
how does one cross a TSS lane?
at right angle to it
who has to give way in an overtaking scenario?
overtaking boat has to give way, regardless of type of boat
who has to give way in a head on scenario?
both boats blast 1 short blast and alter course to starboard side I.e. pass the other ship on the port,
a sail boat and a power boat are approaching head on, who has right of way?
sail boat
2 power boats are approaching at 90 deg angle, who should give way? what should stand on boat do?
If boat A is approaching boat B, on boat A’s starboard, Boat A should give way and head to the stern of boat B I.e. if you see red, you give way.
stand on boat keeps course with caution - be ready to alter course to starboard if necessary, never alter to port
sail boat vs power boat at 90 deg angle, who has right of way?
sail boat is stand on boat (assuming making way under wind)
what is the sequence of priority in vessel type
1) vessel not under command
2) vessel restricted in ability to manoeuvre
3) vessel constrained by draught
4) vessel engaged in fishing
5) sailing vessel
what are the degree of angles and color required for a boats nav lights
masthead light - 225deg, white
side lights - 112.5, green for starboard, red for port
stern - 135, white
what is allowed for nav lights in a boat <20m
combined lantern on fore and aft centreline of vessel
Nav lights - 6 categories for lighting in power-driven vessel underway
>50m <50m <20m <12m <7m and <7 knot air cushioned vessel
nav light for boat >50m
2 white forward mast lights one in front one astern and higher
2 separate port/starboard lights
1 stern white light
nav light for boat <50m
1 white mast light ahead
2 separate sidelights
1 white stern light
nav light for boat <20m
1 white mast light ahead
combined side lights
1 stern light
nav light for boat <12m
1 all round white light
combined side light
nav light for <7m and <7 knot
1 all round white light
nav light for air cushioned vessel
1 white mast light ahead
2x separate side lights
1 stern light
1x all round flashing yellow light
you see a boat at night with 1 white light and 1 red light, what does this mean?
approaching the port side of a boat, <50m or <20m or <12m
you see a boat at night with 2 white lights apart from each other and 1 green light, what does this mean?
> 50m, on starboard side
you see a boat at night with 2 white lights one on top of each other and 1 green light and 1 red light, what does this mean?
head on boat >50m
you see a boat at night with one white light, one red light and one yellow flashing light, what does this mean?
port side, air cushioned vessel
what boats are allowed to have combined side lights?
<20m and <12m
what is the difference in lighting between a boat <20m and <12m
<20 needs one forward mast light and one stern light
<12 can use one all round white light
both use combined side light
you are allowed to use the nav lights of a boat one class below yours - T or F
F, can use one above
difference between nav lighting for boat <12m and <7m going <7 kts
<12m use one all round white light and combined nav light
<7m/7kt use one all round white light only
what does a boat underway displaying one all round white light indicate?
<7m and <7knots
difference in lighting between boat <50m and <20m
<50 need 2 separate side lights
<20m can use combined sidelights
lighting for vehicle engaged in towing (night)
>200m and <200m
> 200m: 3 white masthead lights in vertical stack, separate side lights, white stern light AND yellow towing light above stern light
<200m: 2 white masthead light in vertical stack, separate side lights, white stern light AND yellow towing light about stern light
signal for vehicle engaged in towing >200m during the day
towing vessel to display black diamond shape where it can best be seen
lighting for sailing vessel at night >20m
side light, separate stern lights (no masthead light)
lighting for sailing vessel at night <20m
combined lanterns at top of mast: all round red light, all round green light, and three-colored light below for sidelight and stern light. all in vertical stack
day time signal for sailing vessel making way under motor
black triangle pointing downwards
at night you see a vessel with 3 vertical white lights and two separate side lights, what does this mean ?
vehicle engaged in towing >200m
what does a black diamond shape indicate?
vessel engaged in towing >200m
what does a vessel with 1 red , 1 green, and 1 green light in vertical stack indicate
sailing vessel <20m on starboard side
how to identify a sailing vessel under motor power
black triangle pointing downwards
night lighting for vessel not under command
2 red vertical lights in a line
lighting for vessel not under command but underway
2 red vertical lights, separate sidelight, stern light (no mast light)
day time shape for vessel not under command
2 black balls in vertical
lighting for vessel restricted in ability to manoeuvre
red - white - red all round vertical lights
lighting for vessel restricted in ability to manoeuvre but underway
masthead lights (one lower at bow, one higher astern), separate side lights, stern lights AND red-white-red vertical all round lights
day time signage for vessel restricted in ability to manoeuvre
black color: ball - diamond - ball vertical line
lighting for vessel restricted in ability to manoeuvre but anchored
vertical red-white-red light + anchoring lights e.g. 2 all round white lights for >50m
what does a vessel with 2 red vertical all round light indicate?
vessel not under command
what does a vessel with 2 red vertical all round light indicate with side lights indicate?
not under command but under way
what does 2 black balls during day time indicate
vessel not under command
what does red-white-red in vertical indicate?
vessel restricted in ability to manoeuvre
what is the flag for vessel engaged in diving operations
white and blue flag (flag A)
night lighting for vessel engaged in diving
only display red-white-red in vertical stack
lighting for vessel involved in mineclearing (night and day)
night: usual lights + 3 all round green lights in cross shape
day: 3 black balls in cross shape
night light for vessel constrained by draught
usual lighting + 3 red all round vertical lighting
day symbol for vessel constrained by draught
1 black cylinder
lighting for pilot vessel at anchor
anchoring lights
+ one white and one red all round in vertical at masthead
lighting for pilot vessel underway
one white and one red all round vertical light at/near masthead
+ separate side light + stern light
anchoring lights for vessel >50m
one all white light at bower higher, one all white light at stern lower
anchoring lights for vessel <50m
one all round white light at bow
anchoring day symbol
one black ball
anchoring light/symbol for vessel 7m
not required
lighting for vessel <50m aground
all round white anchoring light + 2 red all around vertical light
vessel aground by day symbol
3 black balls
lighting for vessel >50m aground
anchoring light for >50m + 2 red vertical all round
lighting for vessel <12m aground
not required
how long is the horn blast for prolonged blast
4-6 seconds
what is the horn signal to indicate altering course to starboard
one short blast
what is the horn signal to indicate altering course to port
2 short blasts
what is the horn signal to indicate astern propulsion
3 short blast
what does 5 short blasts indicate?
I don’t understand
what does 3 short blasts indicate
astern propulsion
what does 1 short blast indicate
altering course to starboard
what does 2 short blasts indicate
altering course to port
what does 2 prolonged and 2 short blast indicate
I am intending to overtake on port side
what does 2 prolonged and 1 short blast indicate
I am intending to overtake on starboard side
how to indicate agreement with your sound signal
1 prolonged, 1 short, 1 prolonged, 1 short
how to indicate disagreement with your sound signal
5 short blasts
Boat A is behind Boat B. Boat A lets out 2 long and 2 short blasts, boat B lets out 5 short blasts, what does this mean?
Boat A signalled intention to overtake on port side, but Boat B disagreed
sound signal when in restricted visibility?
1 prolonged blast every 2 minutes
what does 2 prolonged blasts every 2 minute indicate?
restricted visibility, vessel stopped and not making way
who and when is 1 prolonged and 2 short blasts used ?
restricted visiblity, used by vessels
- not under command
- restricted in ability to manoeuvre
- constrainted by draught
- fishing vessel
- sailing vessel
- towing vessel
if a large boat is towing 3 smaller vessels behind, what is the appropriate sound signals to be made by all vessels?
large towing boat to signal 1 long and 2 short every 2 minutes
last towed vessel to signal 1 long and 3 short every 2 minutes
who uses 4 short blasts in restricted visibility:?
pilot vessel engaged in pilotage duty
what size boat and below is not required to make sound signals in restricted visibility?
<12m
what are 4 ways to show distress
red hand flare
waving arms up and down
maydaymaydaymayday
SOS on morse code
what does 2 red all round vertical light on a boat indicate?
vessel not under command
what does 3 red all round vertical light on a boat indicate?
vessel constrainted by draught
what is the lighting for vessel restricted in ability to manoeuvre?
red-white-red vertical stack all round light
what does one black cylinder indicate?
vessel constrained by draught
what does 3 black ball indicate?
vessel aground
you see a boat with one all round white and one red all round light vertical stack, along with separate side light and stern light - what does this indicate?
pilot vessel
