Adverse weather and difficult seabed conditions are slowing efforts to recover the grounded tanker Caroline Bezengi off Oman after it leaked Russian crude into a protected marine area. Oman is coordinating the operation with Ambrey, a risk-management company, as it tries to limit environmental damage from a spill that has spread around a nature reserve and reached the coastline. Officials said monsoon conditions, shallow rocky waters and damage to the vessel have created operational and navigational risks for salvage crews. The tanker, carrying an estimated 800,000 barrels of Russian oil, ran aground on June 30 after what was described as an unexplained attack in June. The vessel is part of Russia’s so-called shadow fleet (older tankers used to mask ownership and evade restrictions) and is under sanctions from the European Union, Ukraine, the UK, Canada and Switzerland.