Abstract: Described herein are unmanned water vehicles, platforms, and media for stealthy, low-power, and long range electronic warfare and signals intelligence. The unmanned water vehicles, platforms, and media herein are capable of capturing communication between ships, land and air and ground stations across multiple spectra, and transmitting real-time disambiguated transmission recordings and source positions.

Abstract: Embodiments of the invention provide a method for generating a three dimensional representation of a staircase in a computer aided design drawing. Generally, embodiments of the invention allow a user to create a three dimensional stair object with an arbitrary tread shape and with an arbitrary overlap between any two adjacent treads. A user creates or specifies line work elements in a two dimensional plan view to represent aspects the desired staircase, and a computer aided design application generates a three dimensional stair object from this information. Once generated, a three dimensional stair object may be manipulated using a variety of user selectable grips, simplifying both the design process and work required to modify a three dimensional stair object included in a CAD drawing.