International Docking System Standard

[1] The plan is for all cooperating agencies to make their future docking systems IDSS compatible.

As the spacecraft approach each other, the petals on the SCS align the two docking rings and the two become mechanically latched.

The use of the SCS allows for 6 degrees of freedom, reducing the accuracy requirement of initial docking procedures.

Guide pins are used to ensure accurate alignment of the docking rings to properly allow the hooks to engage.

Boeing Starliner uses the NASA Docking System version of IDSS, implementing the active role.

Visiting spacecraft (Orion, HLS, GLS) will connect to Gateway using IDSS ports.

ISRO is developing the IDSS-compliant Bhartiya Docking System (BDS) for use in Gaganyaan and the Bharatiya Antariksha Station.