The period consolidates radiation-stress driven momentum transfer as the core mechanism behind alongshore currents, longshore sediment transport, and cross-shore flows in the surf zone, anchored by measurements of wave energy, currents, and sediment flux. Coastal boundary-layer dynamics and baroclinic jets arise from interactions among stratification, bottom friction, and cross-shore pressure gradients, yielding shoreward edge-waves and coastal jets on sloping shores, demonstrated through the integration of linear models with observations. Storm-driven sediment transport across shorefaces and shelves is clarified by laminated storm-sand records and grain-size structure, informing coastal evolution. Measurement strategies, including surf-zone sensor arrays, drift and tracer experiments, and in-situ seafloor observations, underpin theory and enable robust tests of the framework. Historical Significance: The era marks a transition from theoretical constructs to observation-based, quantitative models of nearshore hydrodynamics, with radiation-stress concepts operationalized by laboratory and field experiments into practical predictions of wave-driven currents and sediment transport. These foundational works established a cohesive framework that links wave fields, currents, and seabed response, shaping subsequent developments in coastal engineering, littoral transport understanding, and morphodynamics.