GOLD MEDAL PEIZE ESSAY, 1893 . 
361 
defence zones, and military or gun and mine zones. The limits of these 
zones must be distinctly marked both by day and night. No boat is 
under any circumstances whatever to enter a military zone. No gun is 
under any circumstances whatever to be so trained that its projectiles will 
fall or ricochet into a naval zone. In the case of guns this must be 
provided for mechanically, by means of stops bolted down on the 
racers in the case of permanently mounted guns, and by placing large 
stones, timbers, banks of earth, &c., &c., beside the trails of any Q.F, 
or other guns which may be in temporary positions, so that by no 
carelessness or forgetfulness, in moments of excitement, could the guns 
be so trained as to be dangerous to friends. It will be the first duty 
of each Staff Officer to personally see that this is done, and to ascertain 
by actual trial that these stops are really in their correct positions and 
sufficient. 
The above zones should be marked out by marks unmistakeable both 
by day and night. The attached plan of an imaginary defence is 
intended to illustrate what is meant. (Fig, 1.) It represents a 
Fig. i. 
N.B.—- Lights not indicated except those marking out zones. 
Landmari < 0 
Field Sc Q.F. Guns 
Landmark^ 
Battery 
Battery 
v Rockets — BuJEL ' 
% 
OUTER 
military 
ZONE 
Cun Defence & 
p. Minefields. 
Defended Shelter 
for Boats 
NAVAL 
ZONE 
Guard Boats 
■(Distinctive Colour of 
Rockets - Green) 
\\ 
Q.F. Guns Sc Field Guns 
0 Landmark 
