Cohort is a company that provides a range of services and products for customers in defense and security, transport, and related markets. It operates through seven subsidiaries: Chess, EID, ELAC SONAR, MASS, MCL, and SEA. The Chess offers surveillance, fire control, and special projects for demanding environments. The EID designs and manufactures advanced communications systems for naval and military customers. The ELAC SONAR supplies advanced sonar systems and underwater communications to global customers in the naval marketplace. The MASS specializes in data technology such as electronic warfare, digital services, and training support. The MCL develops advanced electronic and surveillance technology. The SEA delivers and supports technology-based products for the defense and transport markets alongside specialist research and training services.