Kerbal Space Program – How to Fix Docking Ports Not Snapping?

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Docking ports are close enough

Why could two docking ports to not snap to each other? They a definitely close enough, speed is about 0.5 m/s and both ships have power. What i'm doing wrong?

Best Answer

Make sure that the ports are parallel to each other, their angle looks slightly off. Moving your ship sideways will help with getting the right angle.