This Defence Standard (DEF STAN) 02–339, in conjunction with the documents referred to herein, specifies the design requirements for Steering and Stabilizer Systems in HM Surface Ships and Royal Fleet Auxiliaries (RFA).

This Defence Standard provides guidance on the environmental conditions in which the equipment shall operate and remain fully functional. It also provides guidance on safety, testing, installation, inspection Setting to Work (STW), trials and preservation requirements.

Details of hydrodynamic parameters of Rudder and Stabilizer Fin design are not covered in this Standard, Where relevant, reference shall be made to the requirements of the System Requirement Document (SRD).