ὡς often indicates the thought or the assertion of the subject of the principal verb or of some other person prominent in the sentence. Here ὡς expresses a real intention or an avowed plea. So often with participles ( cross2086); and also with the prepositions εἰς, ἐπί, πρός; as
ἀπέπλεον . . . ἐκ τῆς Σικελία_ς ὡς ἐς τὰ_ς Ἀθήνα_ς
Herbert Weir Smyth [n.d.], A Greek Grammar for Colleges; Machine readable text [info] [word count] [Smyth].