GMC Diving, formally incorporated as Guerrini Marine Construction, is a specialized commercial diving and marine civil engineering contractor headquartered in Cape Town, South Africa. Since its establishment in 1995, the company has operated as a critical service provider within the maritime, port, and offshore sectors, delivering solutions that range from routine vessel maintenance to complex underwater infrastructure projects. The organization distinguishes itself through a dual focus on engineering and diving, employing management and technical teams that often hold qualifications in civil engineering alongside their commercial diving certifications. This technical background allows the firm to approach subsea projects with a structural understanding that bridges the gap between engineering design and underwater execution.
The company’s primary operations encompass ship husbandry, marine construction, and salvage. In the sector of ship husbandry, GMC Diving assists vessel operators in maintaining fleet efficiency and regulatory compliance. Its teams perform underwater hull cleaning to remove biofouling, which reduces drag and fuel consumption for commercial ships. Additional maintenance services include propeller polishing, stern tube sealing, and the blanking of sea chests or overboard discharges to facilitate internal repairs without drydocking. The company is also heavily involved in underwater inspections, conducting video and photographic surveys approved by major classification societies to assess the structural integrity of hulls and offshore assets.
Beyond fleet support, the firm is a prominent player in marine civil engineering along the African coastline. It executes capital projects such as the construction and rehabilitation of harbor quays, jetties, and slipways. Operations in this domain involve intricate tasks like underwater concreting, grouting, cutting, and welding, as well as the installation of cofferdams to create dry work environments below the waterline. The company also possesses capabilities in subsea cable and pipeline installation, supporting utility and energy infrastructure. Additionally, GMC Diving maintains 24-hour readiness for marine emergencies, offering salvage and wreck removal services to address casualties in the challenging waters off the Southern African coast. Through its integration of engineering discipline and subsea mobility, the company supports the operational continuity of ports and international shipping lanes.
