Complex sentence: Sea Scout Groups often have younger members in Cub Scout and Beaver Scout sections, although they are not counted in Sea Scout numbers, they are allowed to wear the Royal Navy Recognition Badge if their Group has that recognition.
Split into simpler sentences: Sea Scout Groups often have younger members in Beaver Scout and Cub Scout sections. Although they are not counted in Sea Scout numbers, they are allowed to wear the Royal Navy Recognition Badge if their Group has that recognition.