On 5 July 2015 the French intelligence gathering ship Dupuy De Lôme made her southbound passage. This was not expected as a NATO naval exercise is about to begin in the Black Sea. Thus this spy ship could be very handy in the Black Sea.
Later the same day US Navy destroyer DDG-78 USS Porter made her north bound transit through the Turkish Straits. She is taking part in the Bulgarian naval exercise Breeze 2015.