One of the smallest ships to ever come to Pier 21, the former minesweeper arrived in 1948 packed with 347 refugees from the Baltic, triggering a controversy about their admittance to Canada which help shaped Canada's postwar refugee policies. The 1950s marked the peak years of immigration arrivals, many of which were Italian-Canadians. A large two-story addition was built onto the immigration annex building in the 1950s to handle the heavy traffic of postwar European immigration. The Hungarian Uprising in 1956 brought another group of refugees to Pier 21, although some from this wave were now arriving by aircraft. The decline in ocean liner travel due to the rise of jet airliner travel during the 1960s caused immigration to shift to airports. With few ships calling at Pier 21, the terminal was used more often in its final years to handle overflow from airport immigration offices. The last major group of immigrants were 100 Cuban refugees from the Gander International Airport who were transferred to Pier 21 in 1970 to be accommodated while their refugee claims were processed. Pier 21 closed its doors on March 28, 1971. The last ship to bring immigrants to Pier 21 in 1971 was , which bore the same name as the first ship to bring immigrants to the Pier in 1928.