Columbia subject headings:
Harvard subject headings:
Canada. Naval Boarding Service--History--World War, 1939-1945.
Merchant marine--Canada--History--20th century.
Watt, Frederick B.
World War, 1939-1945--Campaigns--Atlantic Ocean.
World War, 1939-1945--Naval operations, Canadian.
World War, 1939-1945--Personal narratives, Canadian.
Princeton subject headings:
Merchant marine--Canada--History--20th century.
World War, 1939-1945--Campaigns--Atlantic Ocean.
World War, 1939-1945--Naval operations, Canadian.