§ 196. The rule that foreign merchantmen must be allowed inoffensive passage through territorial straits without any dues and tolls whatever, had one exception until the year 1857. From time immemorial, Denmark had not allowed foreign vessels the passage through the two Belts and the Sound, a narrow strait which divides Denmark from Sweden and connects the Kattegat with the Baltic, without payment of a toll, the so-called Sound Dues.[361] Whereas in former centuries these dues were not opposed, they were not considered any longer admissible as soon as the principle of free navigation on the sea became generally recognised, but Denmark nevertheless insisted upon the dues. In 1857, however, an arrangement[362] was completed between the maritime Powers of Europe and Denmark by which the Sound Dues were abolished against a heavy indemnity paid by the signatory States to Denmark. And in the same year the United States entered into a convention[363] with Denmark for the free passage of their vessels, and likewise paid an indemnity. With these dues has disappeared the last witness of former times when free navigation on the sea was not universally recognised.
[361] See the details, which have historical interest only, in Twiss, I. § 188; Phillimore, I. § 189; Wharton, I. § 29; and Scherer, "Der Sundzoll" (1845).
[362] The Treaty of Copenhagen of March 14, 1857. See Martens, N.R.G. XVI. 2nd part, p. 345.
[363] Convention of Washington of April 11, 1857. See Martens, N.R.G. XVII. 1st part, p. 210.
The Bosphorus and Dardanelles.
§ 197. The Bosphorus and Dardanelles, the two Turkish territorial straits which connect the Black Sea with the Mediterranean, must be specially mentioned.[364] So long as the Black Sea was entirely enclosed by Turkish territory and was therefore a portion of this territory, Turkey could exclude[365] foreign vessels from the Bosphorus and the Dardanelles altogether, unless prevented by special treaties. But when in the eighteenth century Russia became a littoral State of the Black Sea, and the latter, therefore, ceased to be entirely a territorial sea, Turkey, by several treaties with foreign Powers, conceded free navigation through the Bosphorus and the Dardanelles to foreign merchantmen. But she always upheld the rule that foreign men-of-war should be excluded from these straits. And by article 1 of the Convention of London of July 10, 1841, between Turkey, Great Britain, Austria, France, Prussia, and Russia, this rule was once for all accepted. Article 10 of the Peace Treaty of Paris of 1856 and the Convention No. 1 annexed to this treaty, and, further, article 2 of the Treaty of London, 1871, again confirm the rule, and all those Powers which were not parties to these treaties submit nevertheless to it.[366] According to the Treaty of London of 1871, however, the Porte can open the straits in time of peace to the men-of-war of friendly and allied Powers for the purpose, if necessary, of securing the execution of the stipulations of the Peace Treaty of Paris of 1856.
[364] See Holland, "The European Concert in the Eastern Question," p. 225, and Perels, p. 29.
[366] The United States, although she actually acquiesces in the exclusion of her men-of-war, seems not to consider herself bound by the Convention of London, to which she is not a party. See Wharton, I. § 29, pp. 79 and 80, and Moore, I. § 134, pp. 666-668.
On the whole, the rule has in practice always been upheld by Turkey. Foreign light public vessels in the service of foreign diplomatic envoys at Constantinople can be admitted by the provisions of the Peace Treaty of Paris of 1856. And on several occasions when Turkey has admitted a foreign man-of-war carrying a foreign monarch on a visit to Constantinople, there has been no opposition by the Powers.[367] But when, in 1902, Turkey allowed four Russian torpedo destroyers to pass through her straits on the condition that these vessels should be disarmed and sail under the Russian commercial flag, Great Britain protested and declared that she reserved the right to demand similar privileges for her men-of-war should occasion arise. As far as I know, however, no other Power has joined Great Britain in this protest. On the other hand, no protest was raised when, in 1904, during the Russo-Japanese war, two vessels belonging to the Russian volunteer fleet in the Black Sea were allowed to pass through to the Mediterranean, for nobody could presume that these vessels, which were flying the Russian commercial flag, would later on convert themselves into men-of-war by hoisting the Russian war flag.[368]