New York Times has a video and story about the Greek Coast Guard on the Island of Lesbos and their effort to save refugees attempting the passage from Turkey to Greece.
You might want to watch the video on the New York Times site, because I think the sound is better than the YouTube video version I found and included above.
The film is an Oscar nominated short subject.
A total of 600,000 refugees reportedly made the crossing from 2015 through 2016.