An interesting read for anal naval fanatics:https://news.usni.org/2016/07/13/document-u-s-navy-battle-force-classification-guide?utm_source=USNI+News&utm_campaign=92a91be8f8-USNI_NEWS_DAILY&utm_medium=email&utm_term=0_0dd4a1450b-92a91be8f8-231235393&mc_cid=92a91be8f8&mc_eid=4702e35ee4
