**apologies for cross-postings** Members of the international regulatory community have an expressed need for training materials on underwater acoustics as well as instructional resources that can be quickly accessed and viewed. To meet this need, the Discovery of Sound in the Sea (DOSITS) <http://www.dosits.org/> Team is facilitating a free, five-part webinar series on topics related to underwater sound. Two webinars took place in 2015. The first reviewed science of sound concepts, the second, sound production and reception in marine animals. These webinars, PDF versions of the webinar presentations, and other associated resources, have been archived to the DOSITS website (http://www.dosits.org/resources/all/decisionmakers/ircwebinar/). The third webinar will take place on Wednesday, March 16, 2016, at 12:00 pm (U.S. East Coast time). Dr.'s Dorian Houser and Brandon Southall will review the potential effects of underwater sound on marine mammals. Interested individuals must register in advance for this webinar. To register please visit: http://www.dosits.org/resources/all/decisionmakers/ircwebinar/registration/ To learn more about this webinar series and view other, upcoming webinar dates and speakers, please visit the DOSITS webpage, Webinar Series for Regulators of Underwater Sound. <http://www.dosits.org/resources/all/decisionmakers/ircwebinar/> Questions? Please contact Holly Morin at holly_morin@uri.edu. This webinar series is being sponsored by the American Petroleum Institute (API) <http://www.api.org/>. The American Petroleum Institute (API) is the only national trade association that represents all aspects of America’s oil and natural gas industry. Discovery of Sound in the Sea <http://www.dosits.org/> (DOSITS; www.dosits.org <http://www.dosits.org/>) is a comprehensive, educational website on underwater sound, designed to provide accurate scientific information at levels appropriate for all audiences, including decision-makers.