Military Engineering. Part IV. Bailey Bridge Special Uses. Chapter III. Wet Bridging. Section 1, Sliding Bays, Class 40 and Class 70, WO 7483 Military Engineering. The Bailey Bridge Special Uses. Part IV. Chapter III. Wet Bridging. Section 3, Double Landng Bays. WO 7484 Military Engineering. Part IV. Bailey Bridge, USES. Chapter III. Wet Bridging. WO 8415