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SNAME Chesapeake Section Hears Paper On 'Omega Navigation System' Pictured at the Chesapeake Section April meeting, left to right: Seth Hawkins, Section chairman; Frank Seliars III, moderator, MPR Associates; Comdr. John D. Richardson, USN, author; E. Scott Dillon, MarAd (ret.), and L.C. Hoffmann, John J. McMullen Assoc. The Chesapeake Section of The Society of Naval Architects and Marine Engineers held tihe seventh meeting of its technical program at the Washington Navy Yard's Officers Cluh on April 10," 1974. Approximately 50 members and guests enjoyed the social hour and dinner preceding the technical meeting. Chairman Seth Hawkins opened the meeting by welcoming those in attendance and announc- ing a report from Capt. Richards Miller, USN (ret.), indicating the financial success of the Sailing Yacht Symposium at the Naval Academy on January 19, 1974, and added that complete sets of the symposium papers were available at the Section headquarters for a nominal sum. A donation of $1,000 from the profits of the symposium has been donated to the Sailing Yacht Panel for use in research work. Alexander C. Landsburg, chair- man of the Section nominating committee, was then called upon to read the list of nominees for the Section offices for the following year. The moderator for the technical program was Frank Seliars III, who introduced the author, Comdr. John D. Richardson, USN, Omega Navigation System Project Mana- ger, Naval Electronic Systems Command, Department of the Navy. The author presented an over- view of the Omega Navigation Sys- tem characteristics, including a brief background history of its de- velopment. A brief nontechnical description of the basic principles of operation and slides, showing types of present generation receiv- ers and of land-based transmitting stations, including the various types of antennae and 'associated electronic transmitting gear, were shown. Full system operational status with worldwide coverage from eight transmitting stations is planned for the mid-1970s, with Northern Hemisphere coverage to be completed by the end of the current year. Omega is available Walworth Describes Iron Body Valves In 38-Page Bulletin Walworth iron body valves are de- scribed in detail in a 38-page catalog. Photographs, cutaways and dimen- sional tables show features which im- part high strength and reliability to a wide variety of iron body wedge gate valves, globe, angle, lift-check and swing-check valves. Covering iron body valves for power, process, CPI, pulp and paper, marine, refining, HVAC, airport and general industrial uses, the catalog cites special features of the valves which make them useful to the re- quirements of a given industry. A section is devoted to valve acces- sories and another to flange dimen- sions. For a copy of Iron Valves Bulletin, write : Advertising Department, Wal- worth Company, 1400 West Eliza- beth Avenue, Linden, N. J. 07036. to users in all nations, both on ships and in aircraft. Position cov- erage is attainable to one to two nautical mile root-mean-square ac- curacy. Omega is now being in- stalled on all U.S. Naval surface vessels as a general-purpose all- weather electronic aid to naviga- tion, and plans are made to install Omega in all long-range patrol and transport aircraft of the U.S. Na- vy and Air Force. Omega is rapidly spreading to the commercial sector, where many fishing fleets and merchant vessels are now so equipped. The author further noted that recording type Omega receivers can indicate ves- sel speeds and are useful in sailing vessels to determine maximum speed relative to land. Numerous interesting discus- sions were initiated from the floor, covering a wide latitude of sub- jects relating to applications of this equipment, position accuracy cri- teria and political connotations in- volved in the selection of location for transmitting stations. The author impressed the mem- bership as to the advantageous aid to navigation provided by the use of Omega. It is destined to be- come an international, worldwide general-purpose navigational aid available to unlimited users. Global Marine And J.F. Pritchard In loint LNG Effort Global Marine Development of Los Angeles, Calif., and J.F. Prit- chard & Co., Kansas City, Mo., have reached an agreement calling for the joint development of floating lique- fied natural gas baseload production plants in offshore areas. The aim of the accord is to com- bine Global Marine's maritime tech- nology and Pritchard's LNG process technology to help implement the floating LNG system, which is said by Pritchard to provide "a practical means of utilizing hydrocarbon re- sources that cannot be economically exploited using only shore-based fa- cilities." LUBE OIL CLARIFIER- COALESCERS remove 99% of all solid contaminants and free water ON A SINGLE June 1, 1974 27
