The following is text of a news release from Robert Allan Ltd.:
(VANCOUVER, British Columbia and HOUSTON) — Gulf Island Shipyards has completed the second of 10 Z-Tech 30-80 tugs, five of which were ordered by Suderman & Young Towing Co. Once completed, these tugs will be operated in ports on the Texas Gulf Coast by G&H Towing Co.
The Z-Tech 30-80 tug Ted C. Litton evolved from the previous Z-Tech 7500 design for Suderman & Young. Designed and built with a sponsoned hull form, escort capability of the tug is significantly enhanced.
The design incorporates the best handling and operational characteristics of azimuthing stern drive (ASD) tugs and the unique RAstar series hull form. The new Z-Tech series tugs are intended for operation primarily in major ports and marine terminals. The series emphasizes the safe and capable operation of ship-handling operations with large ships, particularly those with extreme flares. Emphasizing the need to work in either a push or pull mode under the flared ends of large containerships and car carriers, the Z-Tech has a relatively low forward sheer, and a wide, heavily fendered bow.
Particulars of Ted C. Litton are:
Length overall: 98’ 6”
Beam, molded: 42’ 8”
Depth, molded: 16’ 5”
Gross tonnage: ITC 411, U.S. regulatory 297
The tugs were designed and constructed to comply with all applicable rules and regulations of ABS ✠ A1 Towing Service, ✠ AMS, Escort Service,
Fire Fighting Vessel Class 1 and all applicable U.S. Coast Guard regulations including Subchapter M.
Tank capacities are as follows:
Fuel oil: 42,620 gallons
Potable water: 6,700 gallons
Sea trial results showed Ted C. Litton met all requirements to the design:
Bollard pull, ahead: 84.45 MT
Free running speed, ahead: 13 knots
Customized general layout of the tug represents more than a decade of cooperation by Robert Allan Ltd. naval architects and the owners. The master and chief engineer’s cabin along with galley and mess are located on the main deck, while two cabins for four crewmembers are located on the lower deck.
Main propulsion for the tug is provided by a pair of Caterpillar 3516E EPA Tier 4 diesel engines, each rated 3,386 hp at 1,800 rpm and driving a Schottel SRP 510FP z-drive unit. The tug is fitted with a Fi-Fi 1 system with two FFS 6,200-gpm pumps driven by two Caterpillar C18 engines. Each of the fire pumps have foam proportioner valves to add foam capability to the off ship firefighting system.
The electrical plant consists of two John Deere 6068AFM85 diesel gensets, each with a power output of 125 eKw 480V, 3-Ph, 60 Hz.
Ship-handling fenders at the bow consist of one tier of 36-inch OD by 18-inch ID cylindrical fender at the main deck level with 16-inch-thick double loop soft fenders between the main deck and the knuckle at bow and along the sheer lines of main deck. Sixteen-inch OD by 8-inch ID cylindrical fendering is used at the stern.
