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

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'