Product Code:SAE J1779 Title:Ship Systems and Equipment-Hydraulic System Design Criteria for Marine Vehicles Issuing Committee:Ship Fluid Systems Committee Scope: This Hydraulic Recommended Practice (HRP) provides hydraulic design considerations and criteria with emphasis on features distinctive of lightweight, high performance surface craft and small submersible vehicles. This Recommended Practice applies to fast, high performance, lightweight craft such as hydrofoils, surface effect ships (SES) and to small manned and unmanned submersibles where light weight is paramount and aerospace technology can be applied.