Christophe Vrignaud is an Engineer for the French Ministry of Defence. His main interest is related to underwater acoustics. Early in his career he focused on fishery acoustics. He has been in charge of the French Hydrographic and Oceanographic Service onboard acoustic systems since 2007,. For SHOM, he mainly focuses on MBES qualifications and training of surveyors. He has been conducting multiple acceptance and qualification surveys at sea.