Signed open magnetic flux map at 1.0 R_⊙ showing the equatorial extensions of the coronal holes in the vicinity of the west limb as seen by Metis (vertical line). The open magnetic field lines were computed from the inner radius (1.0 R_⊙) to the outer radius of the mapping (3.0 R_⊙). The indented appearance of the coronal hole extensions is due to low-lying closed structures formed by the presence of parasitic polarities in the radial magnetic field map.