How do you use ferry pieces?

Almost all custom variants have ferry pieces. But how do you use those?

tf is a ferry piece?

in the variants server's position editor....

fairy piece*

Do you mean ferry sailboats?

https://www.chess.com/clubs/forum/view/the-fairy-pieces-introduction

It's fairy pieces

alibaba ,alfil and their,s riders artibishop and amazon ,berolina,camel and his rider , Dragon bishop ,grasshoper,general and hiqque horse. dibaba and his rider nightrider, soldier ,sergeant ,stone general , 1 point queen , and 3 more pieses what i forgot thei,rs names