Bulgarian naval research ship bound back home from Antarctica
                        
                
                    
                        
                            
                            
                        
                    
                
            
        
    site.btaDay 126: RSV 421 Crosses Bosphorus, Enters Black Sea
                                            
                                                                                                                                                        BTA Photo
                                                                                                                
                    
                    
                        
                                                                                            
                        
                    
                                                        
                    
                
                In the early hours of May 1, the Bulgarian naval research vessel Sv. Sv. Kiril i Metodii (RSV 421) passed from the Sea of Marmara to the Black Sea through the Bosphorus Strait. 
                                    
                                                                                                /DT/
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