l00 ft. long, which steamed out to the Black Sea by herself. This craft was followed by others, for different countries. Some of these, 110 ft. long, crossed the Atlantic under sail temporarily provided.
As demands came for higher speed, so did the length of the boat increase. We ordered a further batch, 125 ft. long, to carry five torpedo tubes, one in the stem and two on each broadside. Then Messrs Thornycroft built two boats for the Spanish and one for the French Government, which, with a length of 147 ft, gave a speed of 26 knots on the measured mile. These boats carry two torpedo tubes fixed in the stem.
Notwithstanding this notable increase of size, it has not been found that these boats can keep the sea for any length of time. The continual motion is so wearing to the crews that in rough weather their physical energy becomes exhausted, and inability to sleep is one of the most trying conditions of such an existence. When attached to a squadron, their presence at sea is a constant source of anxiety, and hence I think it must be recognised that for a craft able to keep the sea much larger dimensions are necessary. The proper function of torpedo boats is to operate from fixed bases on land, to guard the coast, and harass the squadrons or single ships of an enemy that may venture on aggressive action. A blockading fleet would have to be continually on the alert against night attacks by these wasps of the sea.
It has been sometimes asserted that blockade has been rendered impossible by the introduction of steam
