Russia's war of aggression against Ukraine has had profound effects on the maritime sector. It directly disrupted maritime activities in the Black and Azov seas, causing the suspension of Ukrainian port operations and agricultural exports. Although an export corridor temporarily resumed activities, the termination of the agreement in July 2023 continues to affect Ukrainian shipping. International sanctions against Russia and Belarus have notably targeted shipowners and shipbuilders, restricting Russian ships' access to OECD ports. These sanctions have also halted orders for Russian ship owners in OECD countries, reducing new orders and vessel completions in Russian shipyards. While global seaborne trade and ship demand remain relatively unaffected, the war has prompted longer-term impacts such as altered trading routes, changes in energy demand and costs, potential implications for maritime decarbonisation, and an increase in "dark fleet" vessels.