The one-month survey, to be conducted from the SW Amundsen, will cover parts of block A5 in the Mauritania, Senegal, Gambia, Guinea-Bissau, Conakry basin.
It will focus on a shallow-water area with the data tying in to existing seismic to provide full coverage of over block A5, Shearwater said.
Previously the company had been acquiring seismic over the Woodside-operated Sangomar field off Senegal to the north.