In line mooring tensioner

The In line mooring tensioner (ILMT) is designed to offer an efficient and cost-effective solution for subsea tensioning of a mooring line. They are an innovative alternative to mooring winches installed on the floater, developed jointly by MacGregor and Flintstone Technology. 


The In line mooring tensioner provides means to adjust the tension of the individual mooring lines of a floating platform.

Tension is applied from a surface installation vessel typically around a five-pocket chain wheel.

A chain stopper mechanism locks the mooring line at a particular tension once it is achieved.


In line mooring tensioner can be used for a variety of mooring line types and styles.


  • Cost-effective
  • Frees up deck space
  • Eliminates the need for chain lockers and on-deck chain handling
  • Can be positioned as required in the mooring line

Key features and specifications

  • Can be designed for most chain sizes
  • Chain stopper locks on every second link