THE RIVAL SUBMARINES.

by Percy F. Westerman.

CHAPTER I.

CAPTAIN RESTRONGUET LEAVES CARDS.

The garrison port of Portsmouth was mobilized. Not for the "real thing,"

be it understood, but for the quarterly practice laid down in the joint Naval and Military Regulations of 1917.

Everything, thanks to a rigid administration, had hitherto proceeded with the regularity of clockwork; the Army officials were patting themselves on the back, the Naval authorities were shaking hands with themselves, and, in order to cement the bond of unity, each of the two Services congratulated the other.

To the best of their belief they had reason to a.s.sert that Portsmouth was once more impregnable. A series of surprise torpedo-boat attacks upon the fortress had signally failed. The final test during the mobilization was to be in the form of a combined attack upon the defences by the battleships then lying at Spithead and the airships and aeroplanes stationed at Dover, Chatham, and Sheerness.

At eight o'clock on the morning of the day for the grand attack the fleet at Spithead prepared to get under way. Forty sinister-looking destroyers slipped out of harbour in double column line ahead, and as soon as they had pa.s.sed the Nab Lightship a general signal was communicated by wireless for the battleships to weigh and proceed.

The Commander-in-Chief and the Admiral-Superintendent of Portsmouth Dockyard had breakfasted ash.o.r.e on that particular morning, and both officers, with the Military Lieutenant-Governor of the Garrison, were to proceed to Spithead on a cruiser to witness the departure of the fleet.

It was a fine day, but the beauties of the morning were lost upon them; to have to breakfast at an unearthly hour had considerably ruffled their tempers.

"Come along, Maynebrace," exclaimed the Commander-in-Chief irritably.

"It's six bells already."

"c.o.xswain! c.o.xswain! Where in the name of thunder is my c.o.xswain?"

shouted Rear-Admiral Maynebrace.

"Here, sir!" exclaimed that worthy, saluting.

"Has the Lieutenant-Governor arrived yet, c.o.xswain?"

"Yes, sir. The police at the Main Gate have just telephoned through to say that Sir John Ambrose has arrived, sir, but being rather late proceeded straight to the jetty."

"And kept us kicking our heels here," grumbled Sir Peter Garboard, the Commander-in-Chief. "Look alive, Maynebrace, or----"

At that moment a flag-lieutenant, red in the face and well-nigh breathless with running, dashed up the steps of the portico of the Admiralty House.

"Sir!" he exclaimed. "Sir, this message has just come through."

Sir Peter took the proffered envelope, fumbled with the flap with his flabby fingers, and at last untied the Gordian knot by tearing off one edge.

"Good heavens, Maynebrace!" he gasped. "Read this!"

The Admiral-Superintendent, with unbecoming haste, grasped the paper and read:--

"Vice-Admiral, First Battle Squadron, Home Fleet, to Commander-in-Chief, Portsmouth. On fleet weighing anchor a painted board was found attached to the anchor of every battleship, the said board bearing the words 'With the compliments of Captain Restronguet.' Have ordered fleet to anchor again and am sending divers to investigate. Will communicate their report in due course."

All traces of irritability vanished from the faces of the two Admirals.

Instinctively they realized that something of moment had taken place, and that instant action was necessary.

"A diver has been playing the fool, perhaps?" hazarded Maynebrace.

"Diver? Humph! Can you imagine a diver leaving his card, in the shape of a painted piece of wood, attached to the anchors of forty ships? No, no, Maynebrace, it's not that: at least, that's my opinion."

"Well, then, sir, what is it?" questioned the Rear-Admiral.

"A menace to our fleet, that's what it is. Although there is no real harm done the moral result is bad enough. It's my opinion that there's a foreign submarine at work. Moreover, she must have means of direct outside communication while she is submerged."

"What makes you think it is a foreign submarine?"

"Logic, my dear Maynebrace, logic. None of ours are capable of such a feat, and there's no knowing what these foreigners are up to. As inventors they are miles ahead of us. And what is more, the name--Restronguet--doesn't that sound French?"

"Perhaps," admitted the Rear-Admiral. "But all the same it is exasperating; it is humiliating. And there are some who think that the days of the submarine are over!"

Even as the introduction of ironclads propelled by steam machinery had revolutionized naval warfare in the middle of the nineteenth century, so had the vast strides in military aeronautics rendered obsolete, or nearly so, the huge battleships that were the chief features of the world's navies in the beginning of the present century. For several years a fierce war of controversy was waged between the supporters of an all-powerful navy and those who pinned their faith in vessels capable of supporting themselves in the air and able to use the terribly aggressive means that the researches of science could bestow.

Not only did the Great Powers take up the question. The lesser states of the world, realizing that a sudden revolution in warfare might place them on an equal basis with nations who had hitherto kept them in the background, took the liveliest interest in the discussion. They agreed that since the ill-advised building of the first British Dreadnought had given other Sea Powers a chance to build equally formidable vessels at the same rate of construction, and that in consequence the predominant Navy flying the White Ensign was practically out-of-date, a drastic and sudden revolution whereby a comparatively cheap means of offence could be created might also render obsolete the huge costly leviathans that even the richest nations could ill-afford to maintain in the race for naval supremacy.

In Great Britain the opinion of those qualified to judge was nearly equally divided. The Blue Water School maintained that a numerically superior fleet of ships, capable of defence against aircraft, would meet the case, provided a supplementary division of airships and aeroplanes was ready to act in conjunction with the squadron. Battleships could keep the sea in all weathers, while aircraft were at the mercy of every hurricane.

On the other hand the supporters of the air fleet deprecated the need of a huge navy--using the word navy in the strict sense of the term. All the warships that Great Britain had at her command could not prevent the pa.s.sage by night of airships and aeroplanes--either singly or collectively--across the comparatively short distance between the Continent and the East Coast of England, while by a judicious study of the barometer and climatic conditions generally the dangers of being overtaken by a heavy gale could be reduced to a minimum. Besides, had there not been instances of foreign aircraft manoeuvring over the East Coast naval ports at night during the progress of a terrible equinoctial gale that had caused, amongst other disasters at sea, the loss of several destroyers taking a doubtful shelter in the badly-protected Admiralty Harbour at Dover?

Up to the present time the result of the controversy in Great Britain was a compromise. Instead of spending a couple of million pounds upon a single battleship of between forty or fifty thousand tons, smaller ships were laid down and completed within eleven months. They were not pleasing to the eye. Even the "ironclads," ugly in comparison with the stately "wooden walls" of the early nineteenth century, were models of symmetry and grace beside the latest creations from the brain of the Chief Constructor of the Navy.

The modern battleships were vessels of but ten thousand tons displacement, or about the same as the "Anson" cla.s.s of 1886. Their draught was, however, considerably less, being but twenty-two feet when fully manned and ready for sea. They were propelled by internal combustion heavy oil engines capable of developing 22,000 horse-power, the maximum speed being forty-two knots. The princ.i.p.al armament consisted of twenty-four six-inch guns, that for muzzle velocity, range, penetration, and bursting power of the projectile were more than equal to the fifteen-inch gun mounted on the later Super-Dreadnoughts of the United States Navy. The weight saved in engines, armament, and especially by the absence of coal, was devoted to additional armour.

The battleships were veritable steel-clad vessels, for not only were the sides completely encased in Harveyized steel, but the upper decks were surmounted by a V-shaped roof capable of resisting the most powerfully-charged sh.e.l.l that airships could possibly carry.

Nor was the protection for submarine attack left unprovided for. The whole of the under-water surface was armour-plated, not merely by one skin but by two complete layers of steel, the thickest being on the inside. In the double bottoms thus formed, oil, the food for the motors, was stored. A powerful torpedo might fracture the outer armoured skin and release the oil in that particular section, but having the thickest plating inside it was considered almost a matter of impossibility for the latter to be holed and thus admit the burning oil--a source of danger that had long been recognized--into the vitals of the ship.

Submarine warfare, in the opinion of many naval experts, had had its day. At the height of five hundred feet a scouting aeroplane could easily detect the presence of a submarine so long as it was daylight.

By night a submarine would be fairly safe from observation, but conversely her commander could not with certainty attack a hostile ship that had taken the precaution of manoeuvring with screened lights. In addition to the danger of mistaking friend for foe there was also the possibility, nay probability, of being unable to see the enemy's ship.

It was, however, admitted that the submarine's chance was to attack either at dawn or sunset, with a fairly choppy sea running, and no aircraft to upset the calculations of the officer at the periscope.

Nor had the vast changes occasioned by the development of aircraft been confined to naval affairs. Fortifications, hitherto considered impregnable, were rendered untenable by reason of the danger from attack from above; and in this respect the reorganization of the Portsmouth defences might be taken as an example of what had to be done in other naval and military towns of the British Isles.

As is well known Portsmouth, the princ.i.p.al naval a.r.s.enal of the British Empire, is defended by a triple line of fortifications; while to prevent subsidized tramp steamers from emulating Togo's feat at Port Arthur by being sunk at the entrance to the harbour a line of ma.s.sive concrete blocks were placed from the sh.o.r.e to the east of Southsea Castle, extending seawards as far as to Horse Sand Fort--one of the three built upon the bottom of the sea. This form of defence was severely criticized, for it proved a source of danger to trading and other private ships, while at high tide a torpedo-boat could with impunity pa.s.s over the submerged artificial reef.

Consequently a permanent breakwater, fashioned after the manner of that superb work protecting Plymouth Sound, took the place of the worse than useless concrete blocks; a similar one was constructed from Ryde Sands to the Noman Fort, and thus, with the exception of the main channel between these two hitherto sea-girt forts, Spithead was rendered almost immune from torpedo-boat attacks.

These breakwaters, and indeed all the fortifications on sh.o.r.e, were armed with the latest type of air-craft repelling armament; a three-inch automatic gun, capable of firing one sh.e.l.l per second. The bursting charge of each sh.e.l.l was proved to have an effective radius of a hundred yards, while the creation of air-waves and "pockets" resulting from the detonation, would seriously imperil the stability of every aeroplane within three hundred yards. At night each of these guns was supplied by an ingeniously constructed searchlight that, projecting a narrow ray of light almost parallel with the axis of the gun-barrel, rendered a "miss"

an impossibility unless the range was greatly miscalculated. As the sights of the weapon were altered the beam of the searchlight was automatically adjusted. All the gunlayer had to do was to train the searchlight upon the hostile aircraft and fire.

Yet in spite of all these elaborate means of defence the main portion of the British Navy, seemingly anch.o.r.ed in perfect security at Spithead, had received a most unpleasant moral blow. Who and what is this mysterious Captain Restronguet?

CHAPTER II.