About: http://webisa.webdatacommons.org/109337162

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In essence yes, at work we call them 'neutral fixed tabs', i.e. a tab that is at the same angle as the hull bottom.
http://www.w3.org/ns/prov#wasQuotedFrom	rcuniverse.com