Page 223 - Rules of Navigation2020

C -SIGNALSUSED BY DREDGERS IN CANAL WATER:
(1) DREDGERS WORKING UNDERWAY

Signal No. : by day by Night

1

I am dredging
underway and International
cannot get out signal
of the way.
N.B.: In lieu of the
white
masthead light

2

Passage is clear
on the side shown.

A drum at the yard arm on A white light at the yard arm on
the side on which the which the passage is clear. A
passage is clear red light at the yard arm on
which the passage is not clear.
Two white lights along the
bulwark where passage is clear

3

Passage is clear
on both sides

A drum at both yard arms A white light at both
yard arms and two white
lights along the
bulwark both sides

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