GWO Working at Heights and Manual Handling Combined Refresher (WAH & MH Combined Refresher) Aim: Refreshes safe use of PPE at height, climbing techniques, basic rescue procedures, and ergonomic principles for manual handling to prevent falls and musculoskeletal injuries. Duration: Typically 1–1.5 days (shorter than separate refreshers). Certificate Validity: 24 months (2 years); two separate certificates uploaded to WINDA (one for WAH, one for MH). Prerequisites: Valid (or recently expired) WAH and MH certificates, valid WINDA ID, minimum age 18, good physical health. Why Mandatory: Part of BSTR Onshore/Offshore – required for turbine access. An efficient combined option offered by many GWO training providers.
