It is shown that, if the sensitivities and resonant frequencies of elements in a hydrophone array can be accurately determined before they are placed in an array, it is possible to select their positions in the array so as to reduce minor lobes significantly. An expression for the sensitivity of an individual element that depends on easily and accurately measured quantities has been derived. The variation in phase depends primarily on the resonant frequencies of the elements, if element positions can be held to sufficiently close tolerances. Comparisons of calculated results are made with experimental measurements and with computed results of random placement of the transducer elements.