Underwater noise from ship traffic is one of the major threats to Puget Sound’s endangered Southern Resident orcas. It can interfere with the whales’ ability to communicate, navigate by echolocation and find the increasingly scarce salmon they prefer. A recommendation from the orca recovery task force convened by Gov. Jay Inslee in 2018-19 is to reduce noise and disturbance from large vessels. Work is underway to develop a program called "Quiet Sound," which will alert ships to the presence of