U.S. Department of Defense, 1998b
The UH-60 Black Hawk [an Army ACAT IC program] is a single rotor medium-lift helicopter powered by twin General Electric T700-GE-701C turboshaft engines rated at 1,700 shp each. The Black Hawk helicopter provides utility and assault lift capability across a wide range of missions. The Black Hawk is the primary helicopter for air assault, general support, and aeromedical evacuation units. In addition, modified Black Hawks operate as command and control, electronic warfare, and special operations platforms.
The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Appendix A Case Studies and System Descriptions ."
Statistics, Testing, and Defense Acquisition: New Approaches and Methodological Improvements . Washington, DC: The National Academies Press,
Please select a format:
As of 2013, the National Science Education Standards have been replaced by the Next Generation Science Standards (NGSS), available as a print book, free PDF download, and online with our OpenBook platform.
The NGSS offer a detailed description of the key scientific ideas and practices that all students should learn by the time they graduate from high school. The standards are based largely on the 2011 National Research Council report A Framework for K-12 Science Education: Practices, Crosscutting Concepts, and Core Ideas.