The main lights to find under the rules
of the following masthead lights are
white lights on the fore-and-aft
centerline of the ship visible from
writer head around 112.5 degrees on both
sides of the bow that is to 22.5 degrees
above the beam on each side when a
vessel has to show masthead lights on
two masts the foremast light should be
seen lower than the aftermath light and
the lowest light should be above any
obstructions and be between six to 12
meters above the deck sidelights either
red or green lights visible from right
ahead to 112 point five degrees on the
appropriate side of the bow where the
red light is to port and the green one
is to starboard these especially screen
to prevent being seen across the bow and
should be seen lower than the lowest
masthead light Stan light is a white
light visible at 67.5 degrees on both
sides of the Sturm this is to where the
sidelights finish the towing light
meaning a yellow light but having the
same teachers as a stone light
additionally the all-round signal lights
which are sometimes used can be red
green or white in color and shown around
the horizon a full 360 degrees shapes
the shapes defined in these rules
consists of a ball a cone or cylinder or
a diamond and all black and normally
shown where they can best be seen unless
stated otherwise roll 21 definitions of
lights and shapes extracts from panics
one technical details of lights extracts
from x1 technical details of shapes
roll 21 definitions of lights and shapes
a masthead light means a white light
placed over the fore-and-aft centerline
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 writer head to 22.5 degrees
above the beam on either side of the
vessel be sidelights means a green light
on the starboard side and a red light on
the portside each showing an unbroken
light over an arc of the horizon of 112
point five degrees and so fixed as to
show the light from right ahead to 22.5
degrees above the beam on its respective
site in a vessel of less than 20 meters
in length the sidelights may be combined
in one lanthanum carried on the
fore-and-aft centerline of the vessel si
Stern light means a white light placed
as nearly as practicable at the Sturm
showing an unbroken lights over an arc
of the horizon of 135 degrees and so
fixed as to show the light 67.5 degrees
from right after on each side of the
vessel d towing light means a yellow
light having the same characteristics as
the stone light defined in paragraph C
of this rule he all round light means a
light showing an unbroken light over an
arc of the horizon of 360 degrees f
flashing light means a light flashing at
regular intervals at a frequency of 120
flashes or more per minute
extracts from Anna
one positioning and technical details of
lights and shapes one definition the
term height above the hull means height
above the uppermost continuous deck this
height shall be measured from the
position vertically beneath the location
of the light to vertical positioning and
spacing of lights
hey on a power-driven vessel of 20
meters or more in length the masthead
light shall be placed as follows first
the forward masthead light or if only
one masthead light is carried then that
light at a height above the whole of not
less than six meters and if the breath
of the vessels exceeds six meters then
at a height above the whole not less
than such breath so however that the
light need not be placed at a great
height above the hole then 12 meters
second when to mast headlights are
carried the after one shall be at least
4.5 meters vertically higher than the
forward one be the vertical separation
of Master headlights of power-driven
vessels shall be such that in all normal
conditions of trim the afterlight will
be seen over and separate from the
forward light at a distance of 1000
meters from the stem when viewed from
sea level g the sidelights of a
power-driven vessel shall be placed at a
height above the whole not greater than
three-quarters of that of the forward
masthead light they shall not be so low
as to be interfere with my deck lights
extract from an x1 positioning and
technical details of lights and shapes
continued six shapes day shapes shall be
black and of the following sizes one a
ball shall have a diameter of not less
than 0.6 meter to the cone will have a
base diameter of not less than 0.6 meter
at a height equal to its diameter
three-cylinder shall have a diameter of
at least 0.6 meter and a height of twice
its diameter for a diamond shape shall
consist of two cones as defined in two
above having a common base be the
vertical distance between shapes shall
be at least 1.5 meters