About: http://webisa.webdatacommons.org/162260095

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	Well, sort of sonar pulse. you can find enemy subs by selecting a naval unit such as a transport and moving the cursor over the water areas on the map (not the main screen).
http://www.w3.org/ns/prov#wasQuotedFrom	afraid.org