Under tab "Power Plant". Printing on bottom states, "586-39 US Navy Yard, Charleston, SC 17 October 1939. Improvement of Power Plant. Allotment 7-08/0679.1-91-1 (PWA). 5000 c.f.m. steam driven Air Compressor. Contract NOy-3216. Looking northeast. File 7880."
Printing on side states, "MAY61". Included note states, "Two Experiments ---The installation of a ventilation system, indicated by the "chimneys", permitted 500 man shafts of work to be accomplished on the submarine Picuda (SS382) during the sandblasting and painting period. Previously no other work was performed during this period. Incident to the ventilation system is the enclosed air-lock accessed (right). The complete canvas all-weather cover permitted sandblasting and painting to continue without interference from rain, dew, and fog. Work that normally requires ten to twelve days was completed in seven."
Accompaning note states, "Floating Drydock - To augment Drydock No. 1 and Drydock No. 2 Charleston maintains ARD 15 shown here, and ARD 12. These ARDs provide additional capability for meeting heavy docking needs to Fleet in this area."
Writing on bottom states, "(1) Non-Classified (2) EST-1671 (3) CNSYD, Charleston, SC (4) 10 October 1961 (5) Construction of Fire Control and Navigation Building (6) Not Applicable (7) East Side (8) Looking Northwest (9) NBy-31327 (10) NST-EST
