Logarithm of critical eccentricity e_AR (top panels) and associated normalised final-rotation period P_rot∕P_⋆ (bottom panels) as functions of logarithms of orbital period (horizontal axis) and ocean depth (vertical axis), for σ_R = 10⁻⁵ s⁻¹ (left) and σ_R = 10⁻⁶ s⁻¹ (right). The calculated critical eccentricity is such that the final-rotation period satisfies the condition P_rot ∕P_⋆ ≤ 0.95 to retain solely asynchronous states clearly separated from the synchronisation. In the eccentricity maps (top panels), the yellow colour designates the region of the non-resonant regime, where the critical eccentricity is high (log₁₀ e_AR ≈−0.6). Conversely, the blue shades designate the regions where e_AR is low owing to the resonances of the oceanic tidal response. In the final-rotation maps, the yellow colour designates states that are close to synchronisation, while the dark blue colour corresponds to the 3/2 spin-orbit resonance, induced by the degree-3 eccentricity term. Values of parameters used for the solid part are given by Table 1. In both cases, the stellar mass is M_⋆ = 0.09 M_⊙, the initial rotation rate is , and 10 Hough modes are taken into account in the calculation of the tidal response.