The Port Authority Board of Commissioners has approved a measure to undertake a demonstration project with the New York City Department of Transportation to retrofit a Staten Island ferryboat with new exhaust emission reduction devices. If the project is successful, a new agreement between the two agencies could be developed to retrofit the remaining six vessels in the Staten Island Ferry fleet. The demonstration project grew out of discussions with the U.S. Army Corps of Engineers, the U.S. Environmental Protection Agency and environmental agencies in New Jersey, New York and New York City on air impacts associated with the upcoming project to deepen channels in New York harbor to 50 feet.