Adjustment for Twin Steering Primary and Main Shaft Straight-through Is Shown in Fig. 7-12a

Put the primary shaft wheel at the straight-through position using the wheel straight through alignment gauge, and rotate the steering gear input shaft to the upper end surface reticule, facing right ahead (at this moment the steering gear is in the middle position),and then adjust the length of the steering drag link to enable both ends to connect with the steering rocker and steering knuckle arm respectively

По рисунку мало что понятно.
что здесь такое reticule?