Images show people struggling to swim in the water and groups clustered together in the rescue vessels.
Large numbers of small children who apparently braved the perilous journey along with their families can be seen seated on the laps of adults.
In one image, clusters of personal belongings are shown scattered around the deck of an abandoned ship.
Imagery of refugees crossing the Mediterranean Sea has become iconic in recent years, as hundreds of thousands seek safety or employment by journeying to Europe from the shores of Morocco, Algeria, Libya, Egypt, and Turkey.
The UN reports that 271,218 of people arrived by sea this year, and that 3,167 who attempted such a trip are either missing or dead.
Although much attention has focused on refugees from war-torn Syria, many refugees are also from Eritrea.
Hundreds of thousands have fled Eritrea, located on the horn of Africa and bordering Sudan, due to the country's violent, repressive government and limited opportunity for many citizens, according to rights organizations.
The group cites forced labor, arbitrary arrests, detentions, torture, restrictions on freedoms of expression and movement, and repression of religious freedom as being among the incentives Eritreans have to flee their country.