Complex sentence: This was the last time that the ship fired her guns during the battle, as the poor visibility hindered Jellicoe's ability to close with the Germans before Scheer was able to disengage under the cover of darkness.
Split into simpler sentences: This was the last time that the ship fired her guns during the battle. The poor visibility hindered Jellicoe's ability to close with the Germans before Scheer was able to disengage under the cover of darkness.