In brief
A container ship hit by drones sank near Cape Kaliakra, all crew rescued, and Bulgarian authorities are carrying out a series of seawater sampling operations to detect potential pollution, while agencies assess environmental impact.
On Wednesday, a container vessel named CONTSHIP JET, which was traveling southeast of Shabla, was struck by three maritime drones and sank around midnight. The incident, located about 21 nautical miles east of Cape Kaliakra, was reported by the Varna Regional Administration and confirmed by Traffic Control and the Maritime Administration Executive Agency. Bulgarian Telegraph Agency (BTA) furnished these details.
All 18 crew members – 14 Filipinos and four Ukrainians – were rescued by Bulgarian authorities and transported to Varna. They were taken to reception facilities where they were provided medical checks and harbor services, said BTA, citing personnel from the Varna Regional Administration.
The ship, according to BTA, carried a diverse cargo of 421 containers, including lithium‑ion batteries and light fuel oil such as gas oil. Seventeen containers contained hazardous cargo, while around twenty were reported to have fallen overboard during the impact, according to Navy Commander Rear Admiral Kiril Mihaylov.
This incident marks the fifth drone attack within Bulgaria’s exclusive economic zone (EEZ) since the beginning of October, BTA reported, highlighting a growing pattern of maritime drone incidents that could threaten commercial shipping and coastal security.
Investigation and Monitoring Efforts
Teams from the Maritime Administration Executive Agency inspected the sunken vessel on Thursday. They concluded that the removal of light fuel oil, which evaporates quickly, posed a low risk of affecting the marine environment or the Bulgarian coast, BTA noted. The agency communicated its assessment to Regional Governor Mario Smarkov.
Simultaneously, the Defence Ministry collected seawater samples from two sites in Bulgarian territorial waters, saying it observed no visible signs of pollution. The samples were delivered to the Ministry for preliminary laboratory screening, BTA documented, as part of a broader environmental surveillance strategy.
In a coordinated effort, the Environment and Water Ministry announced Thursday plans to gather seawater samples at five coastal sites—Durankulak, Shabla, Cape Kaliakra, Byala, and Sozopol—on the Black Sea shore. The sampling will focus on detecting petroleum products, polychlorinated biphenyls, metals and other physicochemical indicators, BTA quoted.
Samples will be forwarded to the Executive Environment Agency's regional laboratories in Varna and Burgas for analysis, BTA added. The laboratories will test for contaminants that may not be detectable through visual inspection alone, ensuring a comprehensive assessment of water quality.
Additional sampling will target waters surrounding the approximate wreckage of the CONTSHIP JET, with results intended for public release once processed, BTA stated. The Ministry emphasized that the aim is to establish any pollution presence and to spot any unseen changes in seawater quality.
Throughout the week, BTA has reported note of close coordination among the Defence Ministry, the Black Sea Basin Directorate, the Maritime Administration and the Environment and Water Ministry, all of which remain active in monitoring the incident. Contingency plans are maintained in case new pollution signs emerge.
The ongoing monitoring underscores a broader concern about the repeated use of maritime drones in the Black Sea, raising questions about the possibility of coordinated sabotage or illicit activity. However, none of the sources at this stage have linked the attacks to any specific organization or identified the drones’ operators.
Open issues remain: whether the seawater sampling will uncover hidden contamination, how the rapid evaporation of gas oil may influence long‑term marine ecosystems, and whether the repeated drone strikes will prompt stricter maritime security frameworks. BTA will continue to update the public with new findings as laboratories finish their tests.
As analysts observe the pace of drone-based attacks, some experts suggest that the Black Sea region may become a testing ground for politically motivated maritime disruptions. The continued surveillance initiatives by Bulgarian authorities signify a shift toward more proactive environmental and security monitoring post‑incident, BTA summarised.
