moving object relative to rotation

Hello, I have a problem, I have no idea how to move an object relative to its rotation. I rotate an object using "SCNAction.rotateBy" and move it "SCNAction.move". I need to make it so that after rotation at a certain angle, the object moves in a given direction of rotation. Example: We have a spacecraft in 3 dimensional dimensions, I turn it to a certain angle "a" (suppose 18 degrees), after which I press the button and it starts moving in the direction of this ship. I ask for your help.

var YRotate = CGFloat(0 * Double.pi)
    func Rotate(){ // rotate ship
        if stopRotate == true{
          YRotate = CGFloat(2 * Double.pi)
        }else{
          YRotate = CGFloat(-2 * Double.pi)
        }
       let action = SCNAction.rotateBy(x: 0, y: YRotate, z: 0, duration: 10)
       let repAction = SCNAction.repeatForever(action)
        Swift.print(ShipSpaceNode.rotation)
        ShipSpaceNode.runAction(repAction)
        }


 var x = 0 

    var xy = 0
    func Click(){ // moving ship
        if stop == true{
        x = 1
        xy = 1
        } else{
        x = 0
        xy = -1
        }
        Swift.print(ShipSpaceNode.position)
        let koord = SCNVector3(Float(xy), 0 , 0) 

      let moveUp = SCNAction.move(by: koord, duration: 5)
       let hoverSequence = SCNAction.sequence([moveUp]) 

      let loopSequence = SCNAction.repeatForever(hoverSequence) 

        
      ShipSpaceNode.runAction(loopSequence) 
           }