Hatches and Manholes

GOS supplies a full range of marine hatches and manholes engineered for secure access, watertight integrity, and long-term performance in shipboard and offshore service. Our scope covers deck hatches, tank and void manholes, escape and inspection hatches, and custom access covers for new builds and retrofits. Solutions are available in bolted, hinged, quick-acting, and flush configurations to suit tank tops, main decks, bulkheads, and machinery spaces.
 

Units are manufactured in marine-grade steel, stainless steel, or aluminum, with gasket systems and hardware designed to maintain watertight or weathertight performance under specified pressure and load conditions. Options include round, oval, and rectangular designs; raised or flush coamings; multi-bolt or single-bolt closures; and custom sizes for shipyard- or owner-specific standards.
 

All products are designed and manufactured to recognized industry standards and can be delivered with approvals from major certifying bodies such as USCG, ABS, DNV, BV, Lloyd’s, NAVSEA, JIS, and other naval and commercial authorities as required. Leveraging a global network of specialist manufacturers with proven track records, GOS provides project-specific hatch and manhole packages that are documentation-ready, installation-ready, and aligned with the structural, safety, and maintenance requirements of modern marine and offshore assets.