Abstract: A system is presented for enhancing sonar signals wherein Doppler echoes eived in the time domain from a sonar system are processed by digitizing, shifting to baseband, Fourier transforming to the frequency domain, applying a frequency stretching algorithm designed to expand low Doppler signals, retransforming the signal back to the time domain, reshifting from baseband to original center frequency, converting to analog and outputting the resultant enhanced Doppler time domain signals to either earphones of a sonar operator for audio monitoring or for further processing for visual display.

Abstract: A detachable hose assembly for easily connecting a hose to a faucet without using a screwing motion. The detachable hose assembly is comprised of a hose member and a faucet member. The hose member is configured to be attached to a hose and has a front face and a central shaft for communication of water to the hose. The faucet member is configured to be attached to a faucet and has a front face and a central shaft for communication of water to the central shaft of the hose member. The hose member and faucet member are configured to be slidably coupled together in a first orientation to form a single central shaft so that the front faces of the hose member and the faucet member are positioned adjacent each other and the outer surfaces of the members are flush. A raised surface and a seal are positioned about the shaft so that when the hose and faucet members are coupled, the raised surface exerts a force against the seal in a direction parallel to the central shaft so that leakage is reduced.

Abstract: A loading device uses a hitch to support a boat trailer and boat in an elevated position on the rear of a camper. A first member attaches to the aft end of the boat trailer, a second member attaches to the rear of the camper, and latches on the first member engage dogs on the second member to pivotably couple the members together. A winch line is attached at one end to the fore end of the boat trailer and at an opposing end to a winch mounted on the camper. The winch can thus raise the fore end of the boat trailer and thereby rotate the boat trailer about a pivot point through the dogs from a pre-loading horizontal position on the ground to an elevated position supported on the rear of the camper. The loading device is thus mechanically simple because it only needs a hitch, a winch, and a winch line. It is also power efficient because it only pivots the boat trailer, rather than lifting it and then moving it laterally.

Abstract: An apparatus and method for accurately determining the relative locations of sensors in a passive sonar or like monitoring system utilizes two non-parallel (but not necessarily orthogonal) calibrator signals to calculate the relative positions of sensors in a sensor array. Iteration, using a deformed line array constraint, permits reliable solution of the sensor position equations, even when the relative angle between the calibrator signals is initially unknown.

Abstract: A dewatering system for use in the treatment of waste water is disclosed which includes a tank, an inclined filter bed having a plurality of filter elements and components for inducing a flow of air through the filter bed to accelerate drying of the removed solids. Also disclosed are components for adjusting the angle of inclination of the filter bed and mechanical components for removing solids from the filter elements. In one embodiment, the filter bed is disposed within an upper unit mounted for rotation on the tank floor to facilitate cleaning of the filters. Adjusting the angle of inclination of the filter bed provides access from the frame, below, for cleaning the underside of the filter.

Abstract: A dewatering system for use in the treatment of waste water which includes a tank, an inclined filter bed having a plurality of filter elements and means for inducing a flow of air through the filter bed to accelerate drying of the removed solids. Also disclosed are means for adjusting the angle of inclination of the filter bed and mechanical means for removing solids from the filter elements.