HYDROPAC

[ hahy-druh-pak ]
/ ˈhaɪ drəˌpæk /

noun

an urgent warning of navigational dangers in the Pacific Ocean, issued by the U.S. Navy Hydrographic Office.
Compare HYDROLANT.

Origin of HYDROPAC

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019