The Munroe Effect is a hydrodynamic phenomenon utilised in various explosive applications, including anti-tank weapons, demolition charges, EOD tools and perforating devices. It occurs when a shaped explosive charge is detonated, typically with a conical or hemispherical cavity lined with a metallic material. The detonation wave collapses the liner, forming a high-velocity, focused jet capable of penetrating solid targets, leveraging this controlled collapse to generate a highly focused and penetrating jet of material.