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The prospect of relativistic jets exhibiting complex morphologies as aconsequence of geodetic precession has long been hypothesised. We have carriedout a 3D hydrodynamics simulation study varying the precession cone angle, jetinjection speed and number of turns per simulation time. Using proxies for theradio emission we project the sources with different inclinations to the lineof sight to the observer. We find that a number of different precessioncombinations result in characteristic `X' shaped sources which are frequentlyobserved in radio data, and some precessing jet morphologies may mimic themorphological signatures of restarting radio sources. We look at jets rangingin scale from tens to hundreds of kiloparsecs and develop tools for identifyingknown precession indicators of point symmetry, curvature and jet misalignmentfrom the lobe axis and show that, based on our simulation sample of precessingand non-precessing jets, a radio source that displays any of these indicatorshas a 98% chance of being a precessing source.

3D Hydrodynamic Simulations of Large-Scale Precessing Jets: Radio Morphology