CREATE TABLE table_61594 ("Date" TEXT, "Time" TEXT, "Name of ship" TEXT, "Flag" TEXT, "Tonnage" FLOAT, "Fate" TEXT)

Which ship was sunk at 01:00?
SELECT "Name of ship" FROM table_61594 WHERE "Fate" = 'sunk at' AND "Time" = '01:00'
SELECT "Name of ship" FROM "table_61594" WHERE "Fate" = 'sunk at' AND "Time" = '01:00'