A migrant is examined by a doctor after disembarking from British vessel HMS Enterprise in the Sicilian harbour of Catania, Italy, October 6, 2015. The Italian coastguard said on Tuesday some 1830 migrants have been rescued from the Mediterranean sea in a twenty-four hour period. Six different rescue operations took place on Monday with the coastguard reinforced by German, Norwegian, British and Irish vessels. REUTERS/Antonio Parrinello