Original sentence: A heavy oil slick was sighted there the following day, indicating that Grampus may have been lost there in a night attack or gun battle against the destroyers.Japanese seaplanes reported sinking a submarine on 18 February in Grampus patrol area, but Grayback reported seeing Grampus in that same area 4 March.Taking aboard four coast watchers, the men who were stationed.The fifth war patrol by Grampus , from 14 December 1942, to.The second and third patrols of Grampus were marred by a heavy number of antisubmarine patrol craft off Truk and poor visibility as heavy rains haunted her path along the Luzon and Mindoro coasts.The seventh USS Grampus (SS-523)''' was a Tench-class submarine.When repeated attempts failed to contact Grampus, the submarine was reluctantly declared missing and presumed lost with all hands
Edited sentence: A heavy oil slick was sighted there the following.Grampus second and third patrols were marred by.Grampus'''s fifth war patrol, from 14 December 1942, to.Grayback reported seeing Grampus in that same area 4 March.Japanese seaplanes reported.Taking aboard four coast watchers, the courageous men who were stationed.The seventh USS Grampus (SS-523) was a Tench-class submarine.When repeated attempts failed to contact Grampus, the valiant submarine was reluctantly declared missing and presumed lost with all hands.a heavy number of antisubmarine patrol craft off Truk and poor visibility.as heavy rains haunted her path along the Luzon and Mindoro coasts.day, indicating that Grampus may have been lost there in a night attack.or gun battle against the destroyers.sinking a submarine on 18 February in Grampus patrol area, but