A method for sharing of mooring lines in a floating platform provided with: • a first mooring line and a first tightening element for the first mooring line on the floating platform, the first mooring line being deployed from the platform to the seabed or another connecting structure, one end of the first mooring line being connected to the platform, • a second mooring line and a second tightening element for the second mooring line on the floating platform, the second mooring line being deployed from the platform to the seabed or another connecting structure, one end of the second mooring line being connected to the platform, the method characterised by, while the first mooring line is deployed from the platform to the seabed or another connecting structure and while the second mooring line being deployed from the platform to the seabed or another connecting structure: - disconnecting a first portion of the first mooring line from a remainder of the first mooring line that is coupled to the platform to create an end of the first mooring line not connected to the floating platform, the first portion of the first mooring line being inboard relative to the first tightening element; - disconnecting a first portion of the second mooring line from a remainder of the second mooring line that is coupled to the platform to create an end of the second mooring line not connected to the floating platform the first portion of the second mooring line being inboard relative to the second tightening element; - coupling the first portion of the first mooring line with the first portion of the second mooring line to create a single shared line from the two lines (12A, 12B) with the ends of the shared line deployed to the seabed or other connecting structure; - tightening the first mooring line through the tightening element to provide payout of line for the second mooring line; and - loosening the second mooring line. • a first mooring line and a first tightening element for the first mooring line on the floating platform, the first mooring line being deployed from the platform to the seabed or another connecting structure, one end of the first mooring line being connected to the platform, • a second mooring line and a second tightening element for the second mooring line on the floating platform, the second mooring line being deployed from the platform to the seabed or another connecting structure, one end of the second mooring line being connected to the platform, - disconnecting a first portion of the first mooring line from a remainder of the first mooring line that is coupled to the platform to create an end of the first mooring line not connected to the floating platform, the first portion of the first mooring line being inboard relative to the first tightening element; - disconnecting a first portion of the second mooring line from a remainder of the second mooring line that is coupled to the platform to create an end of the second mooring line not connected to the floating platform the first portion of the second mooring line being inboard relative to the second tightening element; - coupling the first portion of the first mooring line with the first portion of the second mooring line to create a single shared line from the two lines (12A, 12B) with the ends of the shared line deployed to the seabed or other connecting structure; - tightening the first mooring line through the tightening element to provide payout of line for the second mooring line; and - loosening the second mooring line.