Not likely. Those are air to ground rockets (3.5" I think?) and the angle would be so high as to be ludicrous to fire at planes following you. More than likely it was a 1-off experimental test for low-flying PB models hunting for subs. If the depth charges didn't finish it off, a steep climb would allow firing the rockets.
Although, that'd be one darned steep pullout if so. I think more than anything it was some hairbrained scheme that never amounted to much.