VMS Help SCA, SCA Topics, Glossary, indicated  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    Uses the current cursor position for the query, when used with
    a FIND or GOTO DECLARATION. If the cursor is in a query display,
    SCA uses whatever occurrence on which it is positioned. If the
    cursor is in a buffer, SCA uses the name on which the cursor is
    positioned and the file the cursor is in to guide the query. SCA
    relaxes the search criteria, if necessary, (for example, allowing
    different versions of the source file) to find the indicated
    occurrence.