You searched for: Author I.M. Systems Group Remove constraint Author: I.M. Systems Group Publisher Coastal Services Center (U.S.) Remove constraint Publisher: Coastal Services Center (U.S.) Subject Oceans Remove constraint Subject: Oceans Subject Aids to navigation Remove constraint Subject: Aids to navigation Place Massachusetts Remove constraint Place: Massachusetts Place Block Island Sound (R.I.) Remove constraint Place: Block Island Sound (R.I.) Data type Point Remove constraint Data type: Point
2012. I.M. Systems Group. This point shapefile represents marine aids to navigation in the Northeastern United States. The Coast Guard maintains systems of marine aids to na... Coastal Services Center (U.S.).