Abstract: A restraint use in a flotation apparatus having components, such as tubular member and couplings, includes a cord having a first end and a second end. Each of the ends is connected to a component. Preferably, the cord is run internally within a tubular member and connects two couplings that are fitted onto opposing ends of the tubular member. The cord has a breaking strength at least sufficient to restrain a coupling when the connection between the coupling and the tubular member is compromised such as when a coupling explosively releases from the tubular member. A method for assembling and operating a floating apparatus includes connecting a coupling to a stationary member, such as a second coupling, using a cord. The method can also include configuring the cord to have a breaking strength that is at least sufficient to restrain a coupling when the connection between the coupling and the tubular member is compromised such as when a coupling explosively releases from the tubular member.

Abstract: A floatation device for marine seismic energy sources. The floatation device includes one or more tubular members and a plurality of couplings for sealing and coupling the tubular members to one another. The couplings include an air valve for filling the tubular members with air. One or more marine seismic energy sources are preferably coupled to and supported by the floatation device.

Abstract: An improved acoustic source array system is provided by the invention to generate acoustic signals underwater. The system has an array of acoustic signal sources, such as air guns, towable while underwater behind a surface vessel. The array includes a plurality of these sources, and spreader bar assemblies including these sources. The sources are attached by these assemblies at predetermined separation distances in the array. The spreader bar assemblies provide manifolds for storing and regulating energy, such as compressed air, to operate the sources. The array is connected to the vessel by an umbilical. The sources are controlled by a shipboard controller for firing the sources to provide acoustic signals underwater at selected times. The array may be towed from the ship with the flat side of the array assuming an angle of approximately 45.degree. or less with respect to a vertical axis. The flat side of the array includes a horizontal axis that is normal to the direction of tow.