When the axes of two directional pressure gradient receivers providing inputs to a steerable correlator receiving system deviate from the desired broadside direction, the system output is altered. An analysis of the improvement in output signal-noise ratio shows that, in general, the maximum improvement decreases, the direction of maximum improvement shifts from broadside, and the range on source direction over which there is improvement decreases. Simplified expressions are given for these changes in the important case of small deviation angles. The system output is then studied under the condition that the deviation angles are random variables and probability expressions are derived for the maximum improvement, the direction of maximum improvement, and the improvement at a given source direction. An example is included for the case of independent deviation angles having identical, even, uniform distributions.