Page 25: of Maritime Reporter Magazine (August 1969)

SPECIFY CRANDALL RAILWAY OR FLOATING DRY DOCKS RAILWAY DRY DOCKS ? LOWER INITIAL FIRST COST ? LOWER OPERATION AND MAINTENANCE COST ? GREATER RELIABILITY WITH MAXIMUM SAFETY ? LONG OPERATING LIFE Crandall railway dry docks with inclined tracks which fit natural shore conditions, thus eliminating costly dredging and the need of bulkheads. These docks provide positive ship support at all stages of lift. Because ship positioning and all bilge block operations are controlled from the cradle, no piers are required. Crandall docks can be widened, lengthened and draft increased at relatively low cost. Transfer capability for multiple docking available. Sonar pits, divided cradles and releasing keel blocks make naval ship docking much easier on a Crandall railway. Crandall railway dry docks and transfers are available up to 12,000 tons. FLOATING DRY DOCKS ? LOWEST DEAD WEIGHT AND COST ? EASE IN SELF-DOCKING AND MAINTENANCE ? LONGITUDINAL STRENGTH WITH SECTIONS SECURED TOGETHER ? TRANSFER OF SHIPS TO AND FROM SHORE Crandall floating dry docks are designed with many modern features to reduce labor requirements and improve reliability. Among these improvements are wedge type releasing keel blocks, inclined sliding bilge blocks on short pedestals, vessel centering sys-tem, hinge connections between sections, ball and socket moorings, improved compartmentation for greater stability and very efficient waterways to min-imize dead water. Maximum lifting capacity with minimum displacement and draft is gained using only water ballast which is easily removable. Dock compartments are equipped with individual pumps which eliminate long suction lines and use of many valves for simplicity of control. Crandall Floating Dry Docks are now available up to 70,000 tons with transfer capability. Inquiries are invited for: Enlargement of floating dry docks, Restoration of old timber docks, New dry dock designs. 500 & 1000 Ton Slipways at Ostend, Belgium. Built 1931. Rebuilt in 1946 after World War II. 500 Metric Ton Railway Dry Dock Belgian Naval Base, Nieuport, Built 1957 5000 ton railway dock with side transfers at Sorel, P.O. Operating since 1942. 38,000 ton floating dry dock; Chester, Pa. Crandall-Type hull design reduced dead weight 800 tons Proposals and estimates at no obligation. Write lor Floating Dry Dock Brochure or Railway Dry Dock Brochure which include methods of determining vessel weights and load distribution. £ CRANDALL DRY DOCK IHCCX-A- Inc. since 1854? "Progress ? the result of never being satisified " 238 MAIN STREET, CAMBRIDGE, MASSACHUSETTS 02142, U.S.A. August 1, 1969 27