Accordingly, Zane and four of her sisterships (USS Hopkins DMS-13 3 , USS Southard DMS-10 3 , USS Hovey DMS-11 3 ) and Trever—were to sweep an area extending from the 100 fathom (183 m) curve toward Port Purvis on Florida Island, but split into two groups near Gavutu Island to head simultaneously toward beach "Red," clearing a 1000 yards wide stretch through Lengo Channel toward Indispensable Strait.