MARINE SEISMIC SURVEYING IN ICY OR OBSTRUCTED WATER Russian patent published in 2015 - IPC G01V1/38 B63B21/66 

FIELD: physics; geophysics.

SUBSTANCE: invention relates to geophysics and can be used in seismic survey of regions covered in ice. A skeg is mounted from the stern of a towing vessel and extends below the waterline. A channel in the skeg protects cables for steamers and a source of a seismic system deployed from the vessel. Tow points on the skeg lie below the water surface and connect to tow lines to support the steamers and source. A floatation device supports the source and tows below the water surface to avoid ice floes. The streamers can have vehicles deployed thereon for controlling the position of the streamer. To facilitate location of the streamers, these vehicles on the streamers can be brought to the surface when clear of ice floes so that global positioning system readings can be obtained and communicated to a control system. After obtaining readings, the vehicles can be floated back under the surface.

EFFECT: high quality of survey data.

49 cl, 68 dwg