In 2025, half a century will have passed since the conceptual artist Bas Jan Ader departed Cape Cod in the US in a tiny sailboat. He was bound for the Netherlands and a planned solo show at the Groninger Museum. But he never arrived. Ader’s disappearance has fuelled speculation in the art world. Where did he disappear? If his boat left the US today, where would it end up? The contemporary artist Edward Clydesdale Thomson’s installation lets visitors follow its journey in real time.