CREATE TABLE table_name_84 (name VARCHAR, date VARCHAR, sunk_by VARCHAR)

What is the name of the ship sunk by U-305 on 17 March 1943?
SELECT name FROM table_name_84 WHERE date = "17 march 1943" AND sunk_by = "u-305"
SELECT "name" FROM "table_name_84" WHERE "17 march 1943" = "date" AND "sunk_by" = "u-305"