Abstract: A hydrodynamic foil system for a sensor streamer array includes towing equipment coupled to a survey vessel. The towing equipment includes at least one spreader cable extending substantially transversely to a direction of motion of the survey vessel. A plurality of laterally spaced apart sensor streamers is coupled at respective forward ends thereof to the towing equipment. A plurality of foils disposed on the spreader cable, the foils configured to provide hydrodynamic lift in a vertical direction as the at least one spreader cable is moved through the water. The foils are each rotatable about the spreader cable.

Abstract: A hydrodynamic foil system for a sensor streamer array includes towing equipment coupled to a survey vessel. The towing equipment includes at least one spreader cable extending substantially transversely to a direction of motion of the survey vessel. A plurality of laterally spaced apart sensor streamers is coupled at respective forward ends thereof to the towing equipment. A plurality of foils disposed on the spreader cable, the foils configured to provide hydrodynamic lift in a vertical direction as the at least one spreader cable is moved through the water. The foils are each rotatable about the spreader cable.

Abstract: A streamer cleaning device includes a plurality of cleaning modules affixed to a main frame in angularly spaced apart orientation. At least one cleaning module includes a drive wheel rotationally coupled to a cleaning element. At least one cleaning module includes a guide mounted thereon. The guide is configured to deflect devices mounted on the streamer out of a path traversed by the cleaning modules. At least one of the cleaning modules comprises a device for conversion of motion of water past the at least one cleaning module into rotational energy to drive the drive wheel thereon.

Abstract: A streamer cleaning device includes a plurality of cleaning modules affixed to a main frame in angularly spaced apart orientation. At least one cleaning module includes a drive wheel rotationally coupled to a cleaning element. At least one cleaning module includes a guide mounted thereon. The guide is configured to deflect devices mounted on the streamer out of a path traversed by the cleaning modules. At least one of the cleaning modules comprises a device for conversion of motion of water past the at least one cleaning module into rotational energy to drive the drive wheel thereon.

Abstract: A system for passive acoustic monitoring in connection with seismic surveying includes a survey vessel having a recording system thereon. At least one seismic energy source is coupled to the vessel by a first towing cable. The towing cable includes at least one conductor therein. At least one seismic sensor streamer is coupled to the vessel by a lead in cable. At least one acoustic sensor is coupled to the at least one source by a second towing cable. The second towing cable includes at least one signal conductor configured to transmit signals from the acoustic sensor to the at least one conductor in the first towing cable. The at least one acoustic sensor is configured to detect marine mammal vocalization.