Definition(s)
Tether
Chain or rope used to connect a flexible pipe or a subsea buoy to a tether base, including connecting hardware necessary at each end termination.
Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global Standards
Tethers
Tethers are used to hold subsea buoys in place or to secure the flexible pipe to the seabed in certain flexible pipe configurations, such as a tethered lazy wave configuration. Tethers can be made from chain, wire rope or synthetic fiber.
Source: API RP 17L2, Recommended Practice for Flexible Pipe Ancillary Equipment, First Edition, March 2013. Global Standards