Once Removed Swing is done by doing a Half Tag and a Follow Thru using the appropriate shoulder pass for the handedness of the original wave. Common usages is in Once Removed Swing Thru, Once Removed Spin the Top and Once Removed Fan the Top from normal ocean waves and Two-faced tidal waves. Other uses of the fractional parts are in Once Removed Diamonds. The Half Tags and Follow Thru movements are used in Once Removed Diamond Circulates and in Cut and Flip movements. Once Removed Partner Hinge is a Half Tag.
Once Removed Swing
Once Removed Partner Hinge is just the Half Tag part of this movement.
Look at this example:
Once Removed Swing Thru
Notice that the initial Half Tag is a right shoulder pass because the initial swing is right-handed. The second Half Tag is a left shoulder pass handed because that Swing is left-handed. If this call is made in a left-handed setup, then the centers do the first Swing because they are in a right-handed setup.
Another example is:
Once Removed Spin the Top
This is a bit more complicated but the same rules apply. Each wave does a Half Tag and a Follow Thru. Then the box of four in the center does a left Half Tag, a Follow thru and then another left Half Tag because they are doing another left Swing 1-1/2. While the center couples are doing their left Swing 1-1/2, the end couples move up by doing a right Half Tag.
Incidently, you may notice that the dancers are no longer Once Removed because the formation axis changed.
If the call was Once Removed Fan the Top, the movements would have been:
Once Removed Diamond Circulate
Notice the dancer movements here: