The usual way to determine the direction of a radiating source with an array is to steer the array for maximum output. The steering can be done by time delays or by mechanically turning the array. The output of the array can be expressed as the sum of the time average of the products of the pressure 〈PmPn〉, observed at detectorsmandn. The value of 〈Pm(τm)Pn(τn)〉 can be maximized by a proper choice of time delays τm, τn. This procedure is straightforward in an infinite homogeneous medium. If the medium is a layered waveguide, there are many more possibilities for submaxima of thePmPnterms.The normal mode solution of the radiation field of a band limited noise point source is used to calculate the acoustical pressuresPmandPn. The value of 〈Pm(τm)Pn(τn)〉 as a function of time delay is compared with the value ofPnPmobtained with mechanical steering. For these calculations, the noise source is assumed to have a bandwidth of one fifteenth of the center frequency, and the depth of the water is assumed to be about 2λ over a thick layer of unconsolidated sediment. The number of maxima of the 〈Pm(τm)Pn(τn)〉 is related to the number of modes propagating in the waveguide if the steering is done with time delays. Mechanical steering yields one maximum that corresponds to the source direction.