Petty Officer 3rd Class Kelvin Kolb lowers a sling. Petty Officer 3rd Class Kelvin Kolb lowers a sling as he and the crew of his SH-60 Seahawk helicopter practice search and rescue techniques off the coast of Southern California on Oct. 24, 2006. Kolb, a U.S. Navy aviation warfare systems operator, is attached to Helicopter Anti-Submarine Squadron 4, deployed aboard the USS Ronald Reagan (CVN 76). SHARE IMAGE: Download Image: Full Size (0.1 MB) Photo By: VIRIN: 880998-O-TBA44-289.jpg Photo Gallery