| 1 | A | B | C | D | E | F | G |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 2 | Una-class submarine - Boats |  |  |  |  |  |  |
| 3 | Name | Pennant number | Namesake | Builder | Completed | Decommissioned | Fate |
| 4 | Tisa | P-911 | Tisa | Brodogradilište specijalnih objekata, Split, SR Croatia, SFR Yugoslavia | 1985 | 1997/2001 | extant; to be donated to the Museum of Science and Technology in Belgrade, Serbia. The submarine was delivered to Belgrade in June 2018. |
| 5 | Una | P-912 | Una | Brodogradilište specijalnih objekata, Split, SR Croatia, SFR Yugoslavia | 1986 | 1997/2001 | extant; Porto Montenegro Museum, Montenegro. |
| 6 | Zeta | P-913 | Zeta | Brodogradilište specijalnih objekata, Split, SR Croatia, SFR Yugoslavia | 1987 | 2005 | extant; Pivka Military History Park, Slovenia. |
| 7 | Soča | P-914 | Soča | Brodogradilište specijalnih objekata, Split, SR Croatia, SFR Yugoslavia | 1987 | 2001/2005 | extant; to be donated to a museum |
| 8 | Kupa | P-915 | Kupa | Brodogradilište specijalnih objekata, Split, SR Croatia, SFR Yugoslavia | 1989 | 2003 | scrapped in 2008 |
| 9 | Vardar | P-916 | Vardar | Brodogradilište specijalnih objekata, Split, SR Croatia, SFR Yugoslavia | 1989 | 2005 | fate unknown (sighted 2 May 2018 on the pier at Pristan Naval Base, Pomorska Baza Pristan, Montenegro, with one other sub of same class) |

Question: What was the time duration for which the six boats were completed at the Brodogradilište Specijalnih Objekata (BSO) in Split, SR Croatia?
Answer: All six boats were completed from 1985 to 1989 at the Brodogradilište Specijalnih Objekata (BSO) in Split, SR Croatia.