A study committee appointed by the National Academies of Sciences, Engineering, and Medicine will review the safety record of amphibious vessels (DUKW boats) when used for commercial passenger service and identify options for improving their safety performance through changes in vessel design, engineering, and outfitting. The committee will review findings and recommendations from investigations of casualties involving these vessels by the National Transportation Safety Board, US Coast Guard, and other marine safety authorities in the U.S. and abroad. It will examine the results of technical studies of options for vessel modifications to reduce the risk of a casualty and increase the potential for crew and passenger survival. The committee may also explore other related options that deserve consideration, including any enforcement and operational changes that may be desirable to implement vessel modifications. The committee will summarize the options in terms of the risks they can mitigate and the ways in which the use and operation of DUKW boats could be impacted. Based on its expert appraisal, the committee will identify and suggest places where Coast Guard regulations and policy documents could be modified to implement one or more of the options, such as in the Navigation and Vessel Inspection Circular 1-01 (Inspection of Amphibious Passenger Carrying Vehicles).