Part 13

It is sometimes contended that supply-carriers ought to be vessels of great speed, apparently in order that they may always keep up with the fighting ships when at sea. This, perhaps, is due to a mistaken application of the conditions of a land force on the march to those of a fleet or squadron making a voyage. In practice a land army cannot separate itself--except for a very short time--from its supplies. Its movements depend on those of its supply-train. The corresponding 'supply-train' of a fleet or squadron is in the holds and bunkers of its ships. As long as these are fairly well furnished, the ships might be hampered, and could not be assisted, by the presence of the carriers. All that is necessary is that these carriers should be at the right place at the right time, which is merely another way of saying that proper provision should be made for 'the stream of supplies and reinforcements which in terms of modern war is called communications'--the phrase being Mahan's.

The efficiency of any arrangement used in war will depend largely on the experience of its working gained in time of peace. Why do we not work the direct system of supply whilst we are at peace so as to familiarise ourselves with the operations it entails before the stress of serious emergency is upon us? There are two reasons. One is, because we have used the permanent base method so long that, as usually happens in such cases, we find it difficult to form a conception of any other. The other reason is that the direct supply method is thought to be too costly. The first reason need not detain us. It is not worthy of even a few minutes' consideration. The second reason deserves full investigation.

We ought to be always alive to the necessity of economy. The only limit to economy of money in any plan of naval organisation is that we should not carry it so far that it will be likely to impair efficiency. Those who are familiar with the correspondence of the great sea-officers of former days will have noticed how careful they were to prevent anything like extravagant expenditure. This inclination towards a proper parsimony of naval funds became traditional in our service. The tradition has, perhaps, been rather weakened in these days of abundant wealth; but we should do our best not to let it die out. Extravagance is a serious foe to efficient organisation, because where it prevails there is a temptation to try imperfectly thought-out experiments, in the belief that, if they fail, there will still be plenty of money to permit others to be tried. This, of course, encourages slovenly want of system, which is destructive of good organisation.

We may assume, for the purposes of our investigation, that our permanently equipped secondary base contains a stock of 10,000 tons of coal. Any proportionate quantity, however, may be substituted for this, as the general argument will remain unaffected. As already intimated, coal is so much greater in bulk and aggregate cost than any other class of stores that, if we arrange for its supply, the provision of the rest is a comparatively small matter. The squadron which we have had in view requires an estimated amount of 46,000 tons of coal in six months' period specified, and a further quantity of 4600 tons may be expected to suffice for the ships employed in the neighbouring waters during the remainder of the year. This latter amount would have to be brought in smaller cargoes, say, five of 920 tons each. Allowing for the colliers required during the six months whilst the whole squadron has to be supplied an average cargo of 2300 tons, we should want twenty arrivals with an aggregate of 46,000 tons, and later on five arrivals of smaller colliers with an aggregate of 4600 tons to complete the year.

The freight or cost of conveyance to the place need not be considered here, as it would be the same in either system. If we keep a stock of supplies at a place we must incur expenditure to provide for the storage of the articles. There would be what may be called the capital charges for sites, buildings, residences, jetties, tram lines, &c., for which £20,000 would probably not be enough, but we may put it at that so as to avoid the appearance of exaggeration. A further charge would be due to the provision of tugs or steam launches, and perhaps lighters. This would hardly be less than £15,000. Interest on money sunk, cost of repairs, and maintenance, would not be excessive if they amounted to £3500 a year. There must be some allowance for the coal used by the tugs and steam launches. It is doubtful if £500 a year would cover this; but we may put it at that. Salaries and wages of staff, including persons employed in tugs and steam launches, would reach quite £2500 a year. It is to be noted that the items which these charges are assumed to cover cannot be dispensed with. If depots are established at all, they must be so arranged that the stores deposited in them can be securely kept and can be utilised with proper expedition. The total of the charges just enumerated is £6500 a year.

There are other charges that cannot be escaped. For example, landing a ton of coal at Wei-hai-wei, putting it into the depot, and taking it off again to the man-of-war requiring it, costs $1 20 cents, or at average official rate of exchange two shillings. At Hong-Kong the cost is about 2s. 5d. a ton. The charge at 2s. per ton on 50,600 tons would be £5060. I am assured by every engineer officer to whom I have spoken on the subject that the deterioration in coal due to the four different handlings which it has to undergo if landed in lighters and taken off again to ships from the coal-store cannot be put at less than 10 per cent. Note that this is over and above such deterioration as would be due to passing coal direct from the hold of a collier alongside into a ship's bunkers. If anyone doubts this deterioration it would be well for him to examine reports on coal and steam trials. He will be unusually fortunate if he finds so small a deterioration as 10 per cent. The lowest that I can remember having seen reported is 20 per cent.; reports of 30 and even 40 per cent. are quite common. Some of it is for deterioration due to climate and length of time in store. This, of course, is one of the inevitable conditions of the secondary base system, the object of which is to keep in stock a quantity of the article needed. Putting the purchase price of the coal as low as 15s. a ton, a deterioration due to repeated handling only of 10 per cent. on 50,600 tons would amount to £3795.

There is nearly always some loss of coal due to moving it. I say 'nearly always' because it seems that there are occasions on which coal being moved increases in bulk. It occurs when competitive coaling is being carried on in a fleet and ships try to beat records. A collier in these circumstances gives out more coal than she took in. We shall probably be right if we regard the increase in this case as what the German philosophers call 'subjective,' that is, rather existent in the mind than in the external region of objective, palpable fact. It may be taken as hardly disputable that there will be less loss the shorter the distance and the fewer the times the coal is moved. Without counting it we see that the annual expenses enumerated are--

Establishment charges £6,500 Landing and re-shipping 5,060 Deterioration 3,795 ------- £15,355

This £15,355 is to be compared with the cost of the direct supply system. The quantity of coal required would, as said above, have to be carried in twenty colliers--counting each trip as that of a separate vessel--with, on the average, 2300 tons apiece, and five smaller ones. It would take fully four days to unload 2300 tons at the secondary base, and even more if the labour supply was uncertain or the labourers not well practised. Demurrage for a vessel carrying the cargo mentioned, judging from actual experience, would be about £32 a day; and probably about £16 a day for the smaller vessels. If we admit an average delay, per collier, of eighteen days, that is, fourteen days more than the time necessary for removing the cargo into store, so as to allow for colliers arriving when the ships to be coaled are absent, we should get--

20 X 14 X 32 £8,960 5 X 14 X 16 1,120 ------- £10,080

as the cost of transferring the coal from the holds to the men-of-war's bunkers on the direct supply system. An average of eighteen days is probably much too long to allow for each collier's stay till cleared: because, on some occasions, ships requiring coal may be counted on as sure to be present. Even as it is, the £10,080 is a smaller sum than the £11,560 which the secondary base system costs over and above the amount due to increased deterioration of coal. If a comparison were instituted as regards other kinds of stores, the particular figures might be different, but the general result would be the same.

The first thing that we have got to do is to rid our minds of the belief that because we see a supply-carrier lying at anchor for some days without being cleared, more money is being spent than is spent on the maintenance of a shore depot. There may be circumstances in which a secondary base is a necessity, but they must be rare and exceptional. We saw that the establishment of one does not help us in the matter of defending our communications. We now see that, so far from being more economical than the alternative method, the secondary base method is more costly. It might have been demonstrated that it is really much more costly than the figures given make it out to be, because ships obliged to go to a base must expend coal in doing so, and coal costs money. It is not surprising that consideration of the secondary base system should evoke a recollection of the expression applied by Dryden to the militia of his day:

In peace a charge; in war a weak defence.

I have to say that I did not prepare this paper simply for the pleasure of reading it, or in order to bring before you mere sets of figures and estimates of expense. My object has been to arouse in some of the officers who hear me a determination to devote a portion of their leisure to the consideration of those great problems which must be solved by us if we are to wage war successfully. Many proofs reach me of the ability and zeal with which details of material are investigated by officers in these days. The details referred to are not unimportant in themselves; but the importance of several of them if put together would be incomparably less than that of the great question to which I have tried to direct your attention.

The supply of a fleet is of high importance in both peace time and time of war. Even in peace it sometimes causes an admiral to pass a sleepless night. The arrangements which it necessitates are often intricate, and success in completing them occasionally seems far off. The work involved in devising suitable plans is too much like drudgery to be welcome to those who undertake it. All the same it has to be done: and surely no one will care to deny that the fleet which has practised in quiet years the system that must be followed in war will start with a great advantage on its side when it is at last confronted with the stern realities of naval warfare.

POSTSCRIPT

The question of 'Communications,' if fully dealt with in the foregoing paper, would have made it so long that its hearers might have been tired out before its end was reached. The following summary of the points that might have been enlarged upon, had time allowed, may interest many officers:--

In time of war we must keep open our lines of communication.

If we cannot, the war will have gone against us.

Open communications mean that we can prevent the enemy from carrying out decisive and sustained operations against them and along their line.

To keep communications open it is not necessary to secure every friendly ship traversing the line against attacks by the enemy. All that is necessary is to restrict the enemy's activity so far that he can inflict only such a moderate percentage of loss on the friendly vessels that, as a whole, they will not cease to run.

Keeping communications open will not secure a friendly place against every form of attack. It will, however, secure a place against attacks with large forces sustained for a considerable length of time. If he can make attacks of this latter kind, it is clear that the enemy controls the communications and that we have failed to keep them open.

If communications are open for the passage of vessels of the friendly mercantile marine, it follows that the relatively much smaller number of supply-vessels can traverse the line.

As regards supply-vessels, a percentage of loss caused by the enemy must be allowed for. If we put this at 10 per cent.--which, taken absolutely, is probably sufficient--it means that onthe average_ out of ten supply-vessels sent we expect nine to reach their destination.

We cannot, however, arrange that an equal loss will fall on every group of ten vessels. Two such groups may arrive intact, whilst a third may lose three vessels. Yet the 10 per cent. average would be maintained.

This condition has to be allowed for. Investigations some years ago led to the conclusion that it would be prudent to send five carriers for every four wanted.

The word 'group' has been used above only in a descriptive sense. Supply-carriers will often be safer if they proceed to their destination separately. This, however, depends on circumstances.

INDEX