Marine seismic sources and methods of use are described, one source comprising a first set of source arrays and a second set of source arrays, each source array of the first set alternates in cross-line position with source arrays of the second set, each source member of the first set hangs from a hang plate having a first length, and each source member of the second set hangs from a hang plate having a second length, wherein the first length is sufficiently longer than the second length such that downward traveling acoustic pulses emanating from source members in the first set are substantially deghosted by acoustic pulses emanating from corresponding source members of the second set.