The Swedish Coast Guard and several companies have previously recovered environmentally hazardous substances from wrecks where an owner was identified and insurance arrangements could be used. However, the remediation of the shipwreck Thetis was the first time a Swedish governmental authority developed a model for recovery of oil and ghost nets from an older, ownerless wreck, and then performed an oil and ghost net recovery operation on the wreck. Thetis is one of the ~30 shipwrecks classified as an acute environmental hazard. Before the oil recovery operation, it was estimated that the wreck could contain up to 22 cubic meters of oil, which is ten times more than what fits in an oil storage tank in a typical Swedish residential home. It was also established that the wreck had begun to leak oil in smaller amounts. Thetis is located near a sensitive archipelago, both in terms of the marine environment and beach areas. Further out to sea, lies the protected area of ​​Bratten, with large numbers of red-listed threatened species, several of which have their only or main occurrence in Swedish waters. Furthermore, Thetis is located at a depth of 30 meters, near a port and is in relatively good shape. It was therefore suitable as a pilot project for the recovery operation.