SELECT tonnage FROM table_name_54 WHERE u_boats_destroyed__kuk_ = "2" AND ships_sunk__pola_ = "(not recorded)"
Apa tonase terdaftar yang dihancurkan U-boat (kuk) 2 dan kapal tenggelam (pola) dari (tidak direkam)?
CREATE TABLE table_name_54 (tonnage VARCHAR, u_boats_destroyed__kuk_ VARCHAR, ships_sunk__pola_ VARCHAR)