On 13 November, "PT-59" had success shelling Sipassa and Guppy Island at the mouth of Choiseul Bay, only 2–3 miles northwest of the Warrior River, shown in map at right. According to Christiansen, the "59" then saw the flash of a muzzle farther back on the high bluffs of the Warrior River on northern Choiseul Island during return fire, and pinpointed heavy automatic fire at the flash, likely knocking out the shore battery. Flushed with his successes, Kennedy, developed a plan for a daylight raid up the Choiseul's Warrior River, shown in the raid on Choiseul map, above. The concept of a daylight raid was rejected by both his Chief Petty Officer, Christiansen, and his senior squadron commander, Lieutenant Alvin Cluster, who considered the plan risky to the extreme. Though the Warrior River acted as a base of operations for many of their barges, it was fortified by large numbers of Japanese shore batteries, and would have been a deadly mission in daylight. As evidenced by his plan for a daylight raid, many of the "59"s crew were concerned that Kennedy volunteered for the riskiest missions and constantly sought out danger, but they were usually willing participants.