By Ali Lyon Gulf Marine Services (GMS) posted a hefty dent in net profit in its half-year results despite a sizeable rise in revenue, as the highly levered business continues to focus on debt reduction. The London-listed oil services provider, which operates self-propelled and elevating support vessels for the oil sector out of the United Arab Emirates, saw year-on-year revenue rise nine per cent in the six months to 30 June. The company reported revenue for the period of $80.7m (£61.5m), up from $74.3m (£56.6m) in the first half of 2023 and $66.4m (£50.6m) in 2022. The growth was largely down…