THE SERVICE OF Q.F. GUNS IN COAST DEFENCE. 
(2).—The sight is set more quickly than can be done 
at present, especially at night, and no lamp for the 
Setter is required. 
(3).—The Setter does not interfere with the service 
of the gun. 
Objections 
anticipated. 
(4).—There is no interruption of fire on change of 
elevation. Ranging by signal makes the whistle 
and word of command unnecessary. 
In this ranging by notches—as the teeth of the rack 
may be called for the sake of brevity—it will doubt¬ 
less be objected that the value of a notch in yards 
constantly diminishes from the shortest to the longest ranges. In the 
case experimented with—the 6-pr. sight—a notch corresponds to about 
100 yards between the ranges of 500 yards and 1500 yards, and there 
is enough friction in the sight gear to allow of a setting half way be¬ 
tween notches if required. However, past experience with fast targets 
has shewn it to be undesirable to alter elevation at smaller intervals 
than 100 yards, and for the principal Q.F. fighting ranges one notch 
gives this interval approximately. 
As to the proposed innovation of substituting signals 
Dnii by eig-naiB. f or worc j s G f command in the day time it appears 
quite feasible, though the writer has not yet tried it, and it is rendered 
possible by diverting the Setter’s attention from the tangent scale on to 
the Gun Group Commander. 
Change of deflection might be signalled in the same way—each wave 
right or left being taken to mean 10 minutes. 
By these means ‘ Rapid fire ’ might be continuous, and uninterrupted 
by change of elevation and deflection, which would be a distinct gain, 
for the dual system of instruction now authorized tends towards un¬ 
certainty as to which method should actually be employed in action. 
Conclusion I n conc l us i° n > I have only to state that the “ click ” 
arrangement is by no means a 'complication.’ It 
does not affect the ordinary working of the sight, except beneficially, 
by lessening the tendency of the bar to slip down during firing. 
It can be fitted at trifling cost to all 6-pr. and 3-pr. sockets. 
