Petty Officer 3rd Class Gwennette Jamerson settles concrete. U.S. Navy Petty Officer 3rd Class Gwennette Jamerson, assigned to Naval Mobile Construction Battalion 11, settles concrete during construction of a pad at the Douda de Ecole Primary School in Grande Douda, Djibouti, on March 18, 2009. The pad will support a new water storage tank, which will provide the school with approximately 1,500 liters of water per day. SHARE IMAGE: Download Image: Full Size (0.03 MB) Photo By: VIRIN: 055388-B-KIV84-230.jpg Photo Gallery