lay the gravity of the situation,
as we realized at the Admiralty early in 1917 that no effort of ours
could increase the output of destroyers for at least fifteen months, the
shortest time then taken to build a destroyer in this country.

And here it is interesting to compare the time occupied in the
production of small craft in Great Britain and in Germany during the
war.

In pre-war days we rarely built a destroyer in less than twenty-four
months, although shortly before the war efforts were made to reduce the
time to something like eighteen to twenty months. Submarines occupied
two years in construction.

In starting the great building programme of destroyers and submarines at
the end of 1914, Lord Fisher increased very largely the number of firms
engaged in constructing vessels of both types. Hopes were held out of
the construction both of destroyers and of submarines in about twelve
months; but labour and other difficulties intervened, and although some
firms did complete craft of both classes during 1915 in less than twelve
months, by 1916 and 1917 destroyers _averaged_ about eighteen months and
submarines even longer for completion.

The Germans had always built their small craft rapidly, although their
heavy ships were longer in construction than our own. Their destroyers
were completed in a little over twelve months from the official date of
order in pre-war days. During the early years of the war it would seem
that they maintained this figure, and they succeeded in building their
smaller submarines of the U.B. and U.C. types in some six to eight
months, as U.B. and U.C. boats began to be delivered as early as April,
1915, and it is certain that they were not ordered before August, 1914.

The time taken by the Germans to build submarines of the U type was
estimated by us at twelve months, and that of submarine cruisers at
eighteen months. German submarine officers gave the time as eight to ten
months for a U-boat and eighteen months for a submarine cruiser.

(It is to be observed that Captain Persius in a recent article gives a
much longer period for the construction of the German submarines. It is
not stated whether he had access to official figures, and his statement
is not in agreement with the figures given by German submarine
officers.)

It is of interest to note here the rate of ship production attained by
some firms in the United States of America during the war.

As I mention later (_Vide_ Cha