Rotation of Animated Java entities

I am making an airship based on the mod "expedition" , using the Animated Java blockbench plugin (documentation at https://animated-java.dev/docs) with the movement of the airship based off a happy ghast. I've got the tp tick command working, and the airship does move with the happy ghast, but it doesn't rotate correctly. I'm pretty stumped on this, and would appreciate any help!