... ambiguity, and low data refresh rate, the methods based on the cooperative acoustic beacon or the baseline positioning cannot meet the trajectory measurement requirements of the underwater high-speed attack weapon. In this paper, a method combining baseline positioning with an inertial measurement unit...

... be ignored, such as initial geometrical error in the parts, the root gap of the groove, positioning and fixture prior to welding. The welding sequence is one of the major contributing factors to the root gap and misalignment, hence to geometrical inaccuracy. Generally, there are 2 major causes of geometrical...

...R.C. Ertekin; Z.M. Qian; G.C. Nihous; L.A. Vega; C. Yang ABSTRACT: Under normal OTEC operating conditions, a floating body could be kept in a global position, within a given radius, without the need for mooring lines or thrusters if the momentum flux from the surface seawater intake or the effluent...