Abstract: An underwater acoustic projector comprising one or more cylindrical shell segments (8), each shell segment (8) having an even number of drivers (10) mounted therein, and the method of manufacturing said projector. The shell segments (8) preferably are formed with a longitudinal slot (14) and have arcuate segments (16), preferably of a dielectric material extending along the sides of the slot (14) for retaining the drivers (10) within the shell segments (8). The combined lengths of the driver is between 70% and 90% of the shell segment (8) length.

Abstract: Method and apparatus are disclosed which permit customization of a marketing campaign system. Client-side plug-in components and server-side plug-in components are provided. The server-side plug-in component and the client-side plug-in component may collaborate. This may be done by operating the server-side plug-in component in response to data input using the client-side plug-in component. Communication may be performed using persistent properties.