Abstract
When bilge water from ships is illegally discharged into the sea, it causes severe damage to the marine and coastal ecosystem. MARPOL Annex-1 does not cover many fishing vessels since it only covers vessels over 400 GT (gross tonnage). According to Turkish Statistical Institute (TURKSTAT) data, only 174 of the 14064 fishing vessels registered in Türkiye are above 400 GT. In our country, only 63 of 325 fishing harbors have waste reception facilities to control and collect bilge water. In this study, the amount of bilge waste that fishing vessels can produce was calculated using engine power information, and it was determined that a fishing vessel can produce an average of 155 L/day of bilge waste. It was also calculated that the bilge waste from fishing vessels could be at least 463872 m3/year, which is more than the 416370 m3 bilge waste collected from all vessels in 2021 according to the data of the Ministry of Environment, Urbanization and Climate Change. As a result, it is assessed that this risk can be reduced by increasing the number of waste reception facilities, the legal responsibility of waste reception facilities for bilge waste of fishing vessels, and strict inspections.
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