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This report discusses a directional wvae gage consisting of one absolute and four differential pressure transducers. The differential pressure gage (DPG) development and field testing at the Coastal Engineering Research Center Field Research Facility pier at Duck, NC, is discussed and data analysis software programs presented. The development of the first nine Fourier directional coefficients from a four-gage pressure sensor array and the first eleven or twenty-one coefficients from a five gage DPG is discussed. Wave height, period, and directional information es estimated from DPG data is compared with estimates from radar and Baylor gauge data at the field evaluation site. Recommendations for future investigations and development of the DPG system are discussed. (Author)