2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/122894We survey results of recent activity towards studying controllability and accessibility issues for equations of dynamics of incompressible fluids controlled by low-dimensional or, degenerate, forcing. New results concerning controllability of Navier-Stokes/Euler systems on two-dimensional sphere and on a generic two-dimensional domain are represented.28 pagesOptimization and ControlMathematical Physics35Q30, 93C20, 93B05, 93B29text