KTL Offshore offer both MoorLink and Marit swivels for use with AHV’s in deep water.  

MoorLink Type 209, 210 and 223 Ultra-short swivels have been designed with
hexagonal geometry, therefore reducing the risk of uncontrolled rolling on
board an anchor handler’s deck. The design  is optimized in order to
reduce maintenance requirements. All MoorLink swivels are approved
by the certifying authorities.

Marit Closed Swivels (Type DT170) are manufactured upon request in high
tensile material. They are fitted on the chain by means of a Kenter
connecting link at both ends. They can be provided especially equipped
for low torque applications.