Question about accuracy of RCS Images Generated by SBR Calculations on Sea Surface Models

[BYuXi]

May I inquire about computational methods:
Can SBR itself be used to analyze sea clutter and multipath effects? My understanding is that SBR can calculate electromagnetic field strength distribution, right? But for a specific aircraft model (like a drone), can constructing calculations based on SBR on a sea surface model accurately represent RCS images? How significant is the error? How accurate can the RCS images be?
Many thanks.