The type dimension of the Rotary Vane Steering Gear System market is primarily divided into hydraulic, electro‑hydraulic, electric, and mechanical configurations. Hydraulic systems dominate due to their proven reliability in high‑load marine environments, accounting for roughly 55% of total unit shipments. Electro‑hydraulic variants, which integrate electronic control modules with traditional hydraulic actuation, capture about 25% as shipbuilders seek finer maneuverability without sacrificing robustness. Pure electric steering gears, leveraging brushless motors and solid‑state controllers, represent an emerging niche of 12%, driven by regulatory pressure for reduced emissions and lower maintenance overhead. Mechanical rotary vane gears, largely confined to legacy vessels and low‑speed craft, occupy the remaining 8%. Each type contributes to the overall market size by aligning with distinct vessel size, operational profile, and lifecycle cost considerations, thereby shaping procurement strategies across the maritime sector.