Abstract: The automatic steering device for an electrically controllable hydraulic steering system automatically controls steered wheels (HR) of a steered vehicle, especially an agricultural machine, according to at least one electronic steering control signal (SHL,SHR).

Abstract: The locating device for an agricultural machine controlled by an automatic steering system includes a first locating device component (OV1) directed at a first portion of a field on which agricultural material is not present, but adjacent an edge (GK) of the agricultural material and producing a first locating signal (OS1), a second locating device component (OV2) directed at a second portion of the field containing the material and adjacent, but not including, the edge of it and producing a second locating signal (OS2), a third locating device component (OV3) directed at a third portion of the field including the edge of the material and producing a third locating signal (OS3), a device for transmitting the first, second and third locating signals (OS1, OS2, OS3) to a regulating device (ST) for generating at least one hydraulic steering signal (SHL,SHR) from a standardized locating signal (NOS) to control the steerable wheels (HR) according to a predetermined locating criterion and a device for generating th