C - SIGNALS USED BY DREDGERS IN CANAL WATERS
(1) DREDGERS WORKING UNDERWAY
Signal No. 1: Dredgers underway
By Day By Night International Signal
I am dredging underway and cannot get out of the way
N.B.- In Lieu of the white masthead light.
Signal No. 2: Passage clear on side shown
By Day By Night
By Day: A drum at the yard arm on the side on which the
passage is clear.
By Night: A white light at the yard arm on which the passage is clear. A red light at the
yard arm on which the passage is not clear. Two white lights along the bulwark where
passage is clear.
Signal No. 3: Passage is clear on both sides
By Day By Night
By Day : A drum at both yard arms
By Night: A white light at both yard arms and tow white lights along the bulwark both
sides.
Signal No. 4: Passing not allowed on either side
By Day By Night
By Day : Two drums one over the other at the yard arm.
By Night : A red light at both yard arms.
Signal No. 5: I am going about
By Day By Night
By Day : Flag D hoisted at the yard arm on the side to
which she is turnling.
By Night : A red light shown at the yard arm on the side to which she is turning. Signal
IP by Morse lamp.
Signal No. 6: I am not under command
By Day By Night International Signal
(2) STATIONERY DREDGERS, FLOATING CRANES, ETC.
Signal No. 1: Passage clear on side shown
(I am at work or moored).
By Day By Night
By Day: A drum at the yard arm on the side on which the
passage is clear
By Night: A white light at the yard arm on the side on which the passage is clear. Two
white lights along the bulwark on the side on which the passage is clear.
Signal No. 2: Passage clear on both sides
(I am at work).
By Day By Night
By Day: A drum at both drum yards
By Night: A white light at bot hyard arms. Two white lights along the bulwark on both
sides.
Signal No. 3: Passage clear on side shown, with speed reduction
Passage is clear on the side shown but only to proceed at the lowest possible speed.
By Day By Night
By Day: A red flag at the masthead. A drum at the yard arm
on the side on which the passage is clear
By Night: A white light over a green light on the side on which the passage is clear. Two
white lights along the bulwark on the side on which the passage is clear.
Signal No. 4: Passing not allowed on either side
Passing not allowed on either side
By Day By Night
By Day: Two drums one over the other at the yard arm.
By Night: A red light at both yard arms
Signal No. 5: Passing not allowed :maneuvering to
clear passage
Passing not allowed . I am manoeuvring to make fast to clear the Passage.
By Day By Night
By Day: A red flag at the masthead & 2 drums one over
the other at the yard arm.
By Night: A red light at the masthead. A red light at both yard arms.
Signal No. 6: I am not under command - passing not allowed
Passing not allowed. I have a breakdown & cannot get out of the way.
By Day By Night International Signal