1991 naval battle in the Croatian War of Independence
The Battle of the Dalmatian Channels was a three-day confrontation between three tactical groups of Yugoslav Navy ships and coastal artillery, and a detachment of naval commandos of the Croatian Navy fought on 14–16 November 1991 during the Croatian War of Independence. On 14 November, the commandos torpedoed the "Mirna"-class patrol boat PČ-176 "Mukos" close to the island of Brač in the Split Channel of the Adriatic Sea, prompting a Yugoslav naval bombardment of Brač and Šolta Island the same day. The drifting "Mukos" was salvaged by Croatian civilian boats and beached at Nečujam bay.
The next day, a group of Yugoslav Navy vessels, organised into the Kaštela tactical group (TG), deployed to the Split Channel, and bombarded the city of Split in retaliation for the loss of "Mukos". In return, Croatian coastal artillery engaged the Kaštela TG. To draw off some of the artillery fire, the Yugoslav Navy deployed another group of vessels from the island of Vis, organised as the Vis TG, south of Šolta, where it was engaged by more Croatian artillery. The Kaštela TG retreated east and joined with the Ploče TG, consisting of three minesweepers.
On 16 November, the combined Yugoslav force sailed through the Korčula Channel—a strait separating the islands of Hvar and Korčula—to reach safety at the Yugoslav Navy base at Vis. The warships were then engaged by Croatian coastal artillery deployed on Korčula and the Pelješac Peninsula, losing two minesweepers to the artillery fire in the process.
The battle marked the last deployment of the Yugoslav Navy into one of the Dalmatian channels, the loosening of the naval blockade of the Croatian coast imposed in September, and the largest Croatian Navy operation in the war. The Croatian Navy later towed the grounded "Mukos" to Šibenik, repaired the vessel and put her into service as OB-62 "Šolta". During the battle, 22 Yugoslav Navy crewmen, two Croatian gunners and two civilian sailors in Split were killed. Thirty-three Yugoslav officers were charged in relation to the naval bombardment by Croatian authorities.
Background.
In 1990, following the electoral defeat of the government of the Socialist Republic of Croatia, ethnic tensions increased. The Yugoslav People's Army ("Jugoslovenska Narodna Armija" – JNA) confiscated Croatia's Territorial Defence Forces' ("Teritorijalna obrana" – TO) weapons to minimize resistance. On 17 August, the tensions escalated into an open revolt by Croatian Serbs, centred on the predominantly Serb-populated areas of the Dalmatian hinterland around Knin, and parts of Lika, Kordun, Banovina, and eastern Croatia. This was followed by two unsuccessful attempts by Serbia, supported by Montenegro and Serbia's provinces of Vojvodina and Kosovo, to obtain the Yugoslav Presidency's approval for a JNA operation to disarm Croatian security forces in January 1991.
After a bloodless skirmish between Serb insurgents and Croatian special police in March, the JNA, supported by Serbia and its allies, asked the federal presidency to give it wartime authorities and to declare a state of emergency. The request was denied on 15 March and the JNA came under the control of Serbian president, Slobodan Milošević. Preferring a campaign to expand Serbia rather than to preserve Yugoslavia, Milošević publicly threatened to replace the JNA with a Serbian army and declared that he no longer recognized the authority of the federal presidency. By the end of March, the conflict had escalated into the Croatian War of Independence. The JNA intervened; they increasingly supported the Croatian Serb insurgents and prevented Croatian police from intervening. In early April, the leaders of the Croatian Serb revolt declared their intention to integrate the area under their control, known as SAO Krajina, with Serbia. The government of Croatia viewed this declaration as an attempt to secede.
In May 1991, the Croatian government responded by forming the Croatian National Guard ("Zbor narodne garde" – ZNG), but its development was hampered by a United Nations (UN) arms embargo and the Yugoslav Navy's blockade of the Adriatic coast, both of which were introduced in September. Following the Battle of the Barracks, the ZNG acquired a significant stock of weapons and ammunition, including 34 Yugoslav Navy vessels moored in Šibenik. Croatian forces using naval mines deployed in Kaštela Bay rendered the Yugoslav Navy base at Lora in Split inaccessible. On 8 October, Croatia declared independence from Yugoslavia, and a month later the Croatian National Guard was renamed the Croatian Army ("Hrvatska vojska" – HV). Late 1991 saw the fiercest fighting of the war; the 1991 Yugoslav campaign in Croatia culminated in the Siege of Dubrovnik and the Battle of Vukovar.
During the first days of November, the Yugoslav Navy stopped the Libertas convoy twice for inspection between the islands of Brač and Korčula as it enforced the blockade. The convoy of 40 small boats led by the ferry "Slavija" was on its way to resupply Dubrovnik and retrieve refugees from the besieged city. On 11 November, the Maltese-flagged coaster "Euroriver", manned by a Croatian crew, was sunk by gunfire off Šolta Island.
Order of battle.
Despite the capture of the Yugoslav Navy vessels in September, Croatia's coastal defences relied on captured coastal artillery on the mainland and the nearby islands. In central Dalmatia, these included three batteries on the mainland between Šibenik and Split, guns on Žirje Island, a battery near Zečevo and guns on Smokvica Island near Primošten. Four coastal artillery batteries on islands off Split—the 88-millimetre Marinča Rat on the island of Šolta, the Ražanj battery on the island of Brač, and the 88-millimetre battery Ražnjić and the 85-millimetre battery Privala on the island of Korčula—were captured. Some of the guns captured on Žirje and Šolta were removed and used to set up additional coastal artillery batteries at Kašjuni and Duilovo in Split. Additional batteries were set up in Lovište at the tip of the Pelješac Peninsula, and in Blace and Črna Luka on Korčula on the coast north of Smokvica and Vela Luka. The battery deployed to Črna Luka contained M1942 (ZiS-3) guns. A naval commando detachment from the Croatian Navy was deployed to the western Brač. The coastal artillery was subordinated to the Croatian Navy and commanded by Admiral Sveto Letica.
The Yugoslav Navy deployed three tactical groups (TGs) named Kaštela, Vis and Ploče off the coast of central Dalmatia from its bases on the islands of Vis and Lastovo. The Kaštela TG was deployed to the sea off Split and north of the islands of Šolta and Brač. It consisted of "Koni"-class frigate VPBR-31 "Split", "Končar"-class fast attack craft RTOP-401 "Rade Končar" and RTOP-403 "Ramiz Sadiku", "Osa"-class missile boat RČ-306 "Nikola Martinović", "Shershen"-class torpedo boats TČ-220 "Crvena zvezda" and TČ-224 "Pionir II" and two "Mirna"-class patrol boats, including PČ-176 "Mukos". Kaštela TG may have also included an additional "Osa"-class missile boat. The Ploče TG, deployed to the sea between the mainland and Brač to the east of the Kaštela TG, consisted of three minesweepers: ML-143 "Iž", ML-144 "Olib" and ML-153 "Blitvenica". The Vis TG was deployed off the western tip of the island of Hvar. It consisted of a "Kotor"-class frigate VPBR-34 "Pula" commanded by Captain Ilija Brčić, one "Končar"-class fast attack craft, two "Osa"-missile boats and two "Mirna"-class patrol craft. The Yugoslav Navy fleet was under overall command of Rear Admiral Nikola Ercegović.
Timeline.
14 November.
On 14 November at 5:34 p.m., the Croatian naval commandos attacked "Mukos" off Brač using a torpedo fired from the island. Her crew reported an explosion in the bow of the ship and requested assistance from the Kaštela TG because she started to sink. The Kaštela TG dispatched "Pionir II", which reached "Mukos" shortly afterwards and had transferred the crew of the damaged vessel by 6:10 p.m. "Mukos" was left to drift towards Šolta with her bow fully submerged and containing the bodies of three dead crew members. For nearly the entire night, the Kaštela TG directed gunfire against the Milna and Stomorska areas of Šolta to draw fire from Croatian coastal artillery. However, the coastal artillery deployed in the targeted areas did not return fire. Additional Yugoslav vessels sortied from Vis but returned to their base before the morning without transiting the Split Entrance—the strait between the islands of Brač and Šolta. By that time, the naval gunfire also died down. The Ploče TG remained in their assigned area of patrol.
15 November.
On 15 November at 6:42 a.m., the Kaštela TG commenced a naval bombardment of targets in Split and on the islands of Brač and Šolta. The order was issued aboard VPBR-31 "Split" and the JNA Maritime Military Sector command and JNA bases in Split were advised of the attack. The JNA based in Split did not join the bombardment. Letica notified the JNA Maritime Military Sector commanding officer Major General Nikola Mladenić of the attack, but Mladenić said he could not control the situation because his headquarters was denied a supply of electricity. The European Community Monitor Mission (ECMM) was also notified; they promised to make efforts to stop the bombardment. Shortly after, Letica ordered the coastal artillery to commence fire against the Kaštela TG. Besides several near-misses, the coastal artillery fire scored a direct hit against VPBR-31 "Split", that was attributed to the Marinča Rat-based battery on Šolta. Croatian sources said Mladenić ordered the bombardment in retribution for the loss of "Mukos".
In response to the difficult position of the Yugoslav Navy vessels north of Šolta and Brač, the Vis TG led by "Pula" sailed north from the island of Vis to draw some of the artillery fire away from the Kaštela TG. As the ships approached the Split Entrance, they made a radar contact sailing away from Split towards open sea at a high speed. "Pula", attempting to enforce the blockade imposed in September, requested the vessel by radio to stop for an inspection. The vessel failed to respond and "Pula" fired several shots in front of it before Brčić noticed that it was a hydrofoil carrying an ECMM team and flying the flag of Europe. He abandoned the pursuit and proceeded to Šolta.
The Vis TG came under fire from the coastal artillery when it arrived within of Šolta. In response to the incoming fire, "Pula" fired her bow-mounted gun against targets on Brač and Šolta. Croatian sources said that approximately 800 rounds were fired indiscriminately, striking civilian targets, while Brčić said the TG under his command acted only against artillery located outside residential areas. "Pula" also fired four salvos of depth charges using her RBU-6000 rocket launcher while the land was outside its range to draw greater attention from the artillery gunners.
The Kaštela TG started to withdraw east at approximately 8:00 a.m., fearing the shortest available route to Vis might be mined in the area of Split Entrance. It reached the eastern tip of Brač by 8:30 a.m. At 9:28 a.m., three Yugoslav Air Force J-21 Jastrebs flew low over Brač and Šolta; minutes later, two were reportedly shot down by anti-aircraft artillery. Six Yugoslav jets were sortied against targets on Brač and Šolta. Following the naval action that morning, Croatian civilian boats from Šolta towed the partially submerged "Mukos" to Nečujam Bay and ran it aground there. In the afternoon, the Kaštela TG and the Ploče TG linked up east of the island of Hvar.
16 November.
On 16 November at 11:00 a.m., the Kaštela and Ploče TGs started to assemble at the eastern end of the Korčula Channel, which separates the islands of Hvar and Korčula just north of Cape Lovište at the westernmost tip of the Pelješac Peninsula. The relatively slow minesweepers "Iž" and "Olib", which belonged to the Ploče TG, were hit in the bow and the engine room respectively, by the guns at Lovište. To assist the minesweepers, "Split" turned around to engage the artillery at Cape Lovište while the minesweepers sailed north closer to the Hvar shore in increasingly thick fog. The Croatian guns at Lovište also scored hits on the missile boat RČ-306 and the torpedo boat TČ-224. 
At 3:30 p.m., the Kaštela TG turned around once more to attack Cape Lovište, but were engaged by nearby coastal artillery located on Korčula. "Blitvenica" was damaged in the shooting and the entire naval force moved north-west towards Šćedro Island. "Iž" sustained heavy damage and ran aground in Torac Bay off Hvar, and was abandoned. "Olib" sank between Pelješac and Hvar. Her crew were rescued by the remaining vessels in the group. At 7:00 p.m., the fleet sailed south from Šćedro towards the western part of