210 NICHOLLS'S SEAMANSHIP AND NAUTICAL KNOWLEDGE
In the daytime—
1. A gun or other explosive signal fired at intervals of about
a minute;
2. The International Code signal of distress;
3. * The distant signal, consisting of a square flag, having
either above or below it a ball or anything resembling a ball;
4. A continuous sounding with any fog-signal apparatus;
5. The international distress signal made by radio-
telegraphy or radiotelephony, or by any other distant signalling
method.
At night—
1. A gun or other explosive signal fired at intervals of about
a minute;
2. Flames on the vessel (as from a burning tar-barrel, oil-
barrel, etc.);
3. Rockets or shells, throwing stars of any colour 01
description, fired one at a time, at short intervals;
4. A continuous sounding with any fog-signal apparatus;
5. The international distress signal made by radiotelegraphy
or radiotelephony, or by any other distant signalling method.
The use of any of the above signals, except for the purpose of indi-
cating that a vessel is in distress, and the use of any signals which
may be confused with any of the above signals, is prohibited.
THE STEERING AND SAILING RULES
Articles 17 io 27.
These Articles form the most difficult part of the Regulations for
beginners. A knowledge of the preceding ones depends in a great
measure upon the memory, but the Steering and Sailing Rules appeal
more to your intelligence and knowledge of seamanship. They there-
fore demand special attention in order that you may be able to apply
them readily and promptly whenever occasion to do so arises.
Risk of Collision.—The preliminary paragraph on Risk of Collision
is of great importance, as it shows how you may ascertain—when circum-
stances permit—if risk of collision exists between approaching vessels,
*A further distress signal is provided in the "International Code of Signals."
It is a distant signal consisting of a cone point upwards, having eitner above
or below it a ball, or anything resembling a ball. This signal has not been
sanctioned by Order in Council under the provisions of section 434 of the
Shipping Act, 18&4