Navy training and testing could inadvertently kill hundreds of whales and dolphins and injure thousands over the next five years, mostly as a result of detonating explosives underwater, according to two environmental impact statements released by the military [on August 30]. The Navy said that the studies focused on waters off the East Coast, the Gulf of Mexico, Southern California and Hawaii from 2014 through 2019, the main areas that the service branch tests equipment and trains sailors. Most of the deaths would come from explosives, though some might come from testing sonar or animals being hit by ships. According to the reports, computer models show it may kill 186 whales and dolphins off the East Coast and 155 off Hawaii and Southern California. But Michael Jasny, senior policy analyst at the Natural Resources Defense Council, said the Navy was underestimating the effect its activities on marine mammals. For example, he pointed to a study by government and private sector scientists published just last month in the journal Proceedings of the Royal Society showing mid-frequency active sonar can disrupt blue whale feeding. The study says feeding disruptions and the movement of whales away from their prey could significantly affect the health of individual whales and the overall health of baleen whale populations. Jasny said the Navy's ocean activities are "simply not sustainable." "These smaller disruptions short of death are themselves accumulating into something like death for species and death for populations," Jasny said.