How to attach a (that world type) canvas to a moving player?

Hi! I tried this script, but it doesn;t work:

public Vector3 position;

 public GameObject ship;
 public Camera mainCamera;
 private Vector3 shipPosition;
 public Canvas canvas;

 // Use this for initialization
 void Start()
 {
     shipPosition = ship.transform.position;
 }

 // Update is called once per frame
 void Update()
 {
     InvokeRepeating("SetCanvasPosition", 0f, 0f);
 }
 void SetCanvasPosition()
 {
     canvas.transform.Translate(shipPosition);
 }