👉 A racks fluid, also known as air lubrication system fluid or hydrofoil lubricant, is a specialized lubricant used in marine applications to reduce friction between the ship's hull and the water surface. It is typically a low-viscosity, non-toxic fluid that forms a thin layer of air bubbles between the hull and the water, effectively reducing drag and improving fuel efficiency. This fluid is pumped through channels embedded in the ship's deck racks, creating a continuous flow that maintains the air cushion. By minimizing direct contact between the hull and water, racks fluid not only enhances hydrodynamic performance but also reduces noise and vibration, contributing to a smoother and quieter vessel operation.
