CREATE TABLE table_13188 ("Date" CLOB, "Ship" CLOB, "Tonnage" CLOB, "Nationality" CLOB, "Fate" CLOB)

Name Nationality is on 6 july 1942?
SELECT "Nationality" FROM table_13188 WHERE "Date" = '6 july 1942'
SELECT "Nationality" FROM "table_13188" WHERE "Date" = '6 july 1942'