The Standard Single Cylinder BC System pairs Halcyon wing options with an aluminum backplate to deliver a lightweight, travel-ready buoyancy system for recreational and technical divers. The configuration supports Eclipse or Era wings with selectable lift capacities, a secure adjustable harness, and a stainless steel single tank adapter for reliable cylinder attachment. The system is designed for modular upgrades through the Halcyon Customize Tool so divers can add weight pockets, carbon fiber STA, or personalized colors and branding. Key use cases include travel diving, technical training foundations, and divers who prefer assembling and maintaining their own gear.