This report covers studies of the fundamental flow phenomena that develop around the hull of a modern surface combatant with sonar dome and the signature sources that this flow field gives rise to. Primarily we want to elucidate how different phenomena interact with a view to support the development of such surface combatants. The subject of the study is DTMB 5415, which is an open pre-study model of the Arleigh Burke class US destroyer. A substantial experimental material is available from DTMB, INSEAN and IIHR, and this has been used for further validation of the computational model as well as to develop a deeper understanding of the flow around the hull. Other motives for the selection of this particular model is that many research groups evaluate their computational models against this case, which makes it easy to verify our computational models. In addition, maneuver experiments and data are available for this hull for future computational maneuver studies. Good agreement with experimental data is achieved and the flow around the stern and the propellers create the major flow induced signatures.