Slewing Ramp (Wire-Operated Stern Slewing Ramp)

Structural integrity of ramp hinges, knuckle joints and pivot bearings: inspect for cracks, corrosion, wear and deformation at all articulation points and hinge pins after each operating season or as per class survey interval.

Hydraulic system inspection: check cylinders, hoses, seals, actuators and power pack for leaks, pressure drop, contaminated fluid and correct relief-valve settings; replace seals and filters per manufacturer schedule.

Wire ropes (for wire-operated quarter/slewing ramps): inspect for broken wires, kinks, corrosion, deformation and end-termination condition; measure diameter reduction; replace when discard criteria are met per ISO 4309 / class rules.

Weathertight and watertight sealing: inspect rubber seal strips and compression bars around ramp door perimeter for cracks, set, deformation and adhesion loss; conduct hose or chalk test to verify seal integrity; renew seals as required.

Cleating and locking devices: verify correct engagement and full travel of all hydraulic or mechanical cleats, locking pins and secondary securing devices; check for wear on contact faces and proper alignment.

Ramp surface and guide rails: inspect anti-slip surface (chequer plate, applied grating or nosings) for wear, corrosion, damage or missing sections; check ramp guide channels and rollers for play and lubrication.

Electrical and control systems (especially all-electric ramps): test PLC program, limit switches, position sensors, remote control panels and emergency stop circuits; verify interlocks prevent operation with ramp improperly secured.

Structural coating and corrosion protection: inspect paintwork, sacrificial anodes (if fitted) and any zinc-spray or epoxy coating on ramp steelwork; treat all areas of active corrosion; pay particular attention to hinge pockets and hollow sections prone to water ingress.