Results of the bridge-detection algorithm after filtering for cases where the compression state of the magnetosphere is known (Yao et al. 2022; Louis et al. 2023). Red lines denote bridge-candidate arcs that correspond to manual designations, and grey the arcs that do not but are nevertheless accepted by the random-forest filter. Dark-red dashed lines are those arcs that are identified as PAFs rather than bridge candidates. The seed point of each arc is given in magenta. Manually designated arcs are given in yellow. White contours give the region of validity of the Vogt et al. (2011) JRM33 flux-equivalence mapping along closed field lines. HST exposure identifiers, central timestamps, and the compression state of the magnetosphere are given in the top left.