Here the old discrimination between defensive and offensive armaments is also rejected as inapplicable. It is a well-known fact that the American Secretary of State, Lansing, in his note to the Allies on 18 January 1916, took the point of view that any kind of armament aboard a merchant vessel will make its fighting power superior to that of a submarine and that such armament is therefore of an offensive nature.[[11]]
In the later course of the first World War, the United States changed its opinion and declared that mounting guns on the stern could be taken as proof of the defensive character of the armaments. This standpoint was adopted in some international agreements and drafts, as well as by British jurists in particular. It does not do justice to the practice of naval warfare.
First of all, in this war the guns on many vessels were mounted from the very start in the bows, for instance, regularly on fishing trawlers. Furthermore, the antiaircraft weapons of the merchant vessel, which were especially dangerous for the submarine, were frequently placed on the bridge, and could therefore be used in all directions. Besides, there can be no differentiation between defensive and offensive armaments as to the way the weapons are placed.
In this respect orders alone and the way in which these weapons are meant to be employed are the decisive factors. Soon after the war had started the orders of the British Admiralty had already fallen into German hands. A decision of the Tribunal has made it possible for me to submit them. They are contained partly in the Confidential Fleet Orders, chiefly, however, in the Defense of Merchant Shipping Handbook. They were issued in 1938. They do not therefore deal with countermeasures against illicit German actions but, on the contrary, were already issued at a time when warfare in accordance with the London Agreement was the only form of submarine warfare taken into consideration in Germany.
The instructions further show that all British merchant vessels acted, from the first day of the war, according to orders received from the British Admiralty. These involved the following points with respect to submarine warfare:
(1) Reporting of submarines by radio telegraphy.
(2) The use of naval artillery.
(3) The use of depth charges.
These instructions were supplemented on 1 October 1939, when a call was transmitted over the radio to ram all German submarines.
It might seem unnecessary after this survey to make any mention at all of the defensive and offensive character of such orders. The orders on the use of artillery by merchant vessels, however, do make such differentiation; that is, guns are to be used for defense only, as long as the enemy on his part adheres to the regulations of international law, and for the offensive only when he no longer does. The orders covering the practical execution of these directives reveal, however, that there is no difference at all between defensive and offensive use. Admiral Dönitz explained this in detail when he was heard in Court, and I do not want to repeat it. Actually, from the very beginning of the war merchant vessels were under orders to fire on every occasion on every submarine which came within range of their guns. And that is what the captains of British merchant vessels did. The reason for this offensive action can certainly not be found in the conduct of German submarines during the first weeks of the war, for even the Foreign Office report admits that this conduct was correct. On the other hand, British propaganda may have had great influence, since in connection with the unintentional sinking of the Athenia on 3 September 1939, it disseminated through Reuters on 9 September the assertion that unrestricted submarine warfare was in progress and upheld this assertion notwithstanding the fact that the conduct of German submarines during the first weeks of the war refuted this accusation. Together with the announcement of the British Admiralty’s ramming orders of 1 October 1939, the merchant navy was again officially informed that the German U-boats had ceased to respect the rules of naval warfare and that merchant vessels were to adjust their conduct accordingly. It seems to me of no importance that a corresponding written supplement to Admiralty orders was not issued until the spring of 1940, because nowadays a naval war is not directed by letters but by wireless. But according to the latter, the British captains, as from 9 September or 1 October 1939 at the latest, were directed to use their guns offensively against the German U-boats in accordance with the Admiralty’s instructions as contained in its handbook. The German order to attack armed enemy merchant vessels without warning was issued only on 4 October. Thus it was justified in any case, even if one did acknowledge a difference in treatment for vessels with defensive and offensive armament.