The long-term goals of the research are to investigate the important mechanisms involved in the interaction of current with axisymmetric or cylindrical bodies, which are tethered or free to respond to the fluid forcing. We intend to undertake studies that measure in-line and transverse dynamics and forces, wake vortical motions, and signatures of such bodies undergoing vortex-induced vibrations. Our goal is also to investigate the individual and combined effects of orbital motions and amplitude attenuation with depth on the vortex motions and fluid loading on cylindrical structures in waves. The objectives of this program are firstly to investigate the response and forcing on elastically mounted bodies (cylinders) in a current, representing one case of a tethered structure in the ocean. We intend to understand resonance phenomena, and the relation between forcing and wake-vortex dynamics. A second component is the study of the dynamics of tethered bodies (spheres) in currents. This objective is to investigate the possible existence of periodic oscillation modes, the interaction between transverse and in-line vibrations, and the relationship between the dynamics, the forcing and the wake vortical dynamics/signatures. A third component of the program involves the study of periodic or transient vortex patterns, which can give rise to periodic or intermittent force fluctuations, for both vertical and horizontal cylinders in waves.