Orbital path (dashed line) of the primary of MWC 314 shown around the centre of gravity of the binary (central black dot) and marked for the 16 observed orbital phases (solid dots). The labels provide the φ-values with spectrum numbers in Table 1. The shape and orientation of the orbit are set by e and ω. The disc to the left shows the orbital position of the primary star at φ ~ 0.7. The large outer disc represents the circumbinary wind region extending further away from the gravity centre.