The client came with an outdated desktop UI for fleet management: overloaded grids, long forms, confusing navigation, and fragile offline/sync behavior. We delivered a full UX/UI redesign: audited roles and flows (vessel, shore, inspector), rebuilt the information architecture and user journey, and established robust patterns for PMS, audits/inspections, and the electronic Safety Management System (ISM/ISPS). We designed dense, virtualized data grids with fast filters, grouping, and bulk actions; crisp entity cards; checklists and non-conformity forms; a work and deadline calendar; and spares/status control. Offline states, sync conflicts, and error recovery were modeled explicitly with clear indicators and an operations log. For desktop productivity we added keyboard shortcuts, context menus, in-place editing, frozen columns, and progress feedback for long-running tasks. We built a Windows-oriented design system: tokens, grids, typography, full state matrix, skeletons, empty states, a high-contrast theme, and DPI-aware scaling. Handover included a Figma UI Kit, interactive prototypes, interaction specs, and component behavior rules. Outcome: a fast, predictable interface that shortens audit closure and planned maintenance while providing a unified fleet status view for onboard and shore teams