Page 47: of Maritime Reporter Magazine (April 1984)

USN, Edward J. McMahon, and

Louis W. Nelson.

This paper discusses the new fin stabilizer system developed for the

FFG-7 Class ships, and includes a brief history of fin stabilizers, ad- vantages of fin stabilizers on Navy combatants, brief theory of system operation, approaches used in sys- tem acquisition and vendor selec- tion, and an up-to-date status of the program. 10:30 a.m. "Experience With Reverse Os- mosis Desalination Aboard USS

Fletcher," by Wayne L. Adam- son, Joseph F. Pizzino, and Wil- bur L. Smith.

As part of a program to develop reverse osmosis (RO) desalination systems for shipboard fresh water production, the David Taylor Na- val Ship R&D Center worked with

NAVSEA to install a 12,000 gal- lon per day, two-stage RO plant aboard the USS Fletcher (DD-992) in 1981. The first stage provides potable water (less than 500 parts per million total dissolved solids) for crew needs; the second stage provides high-purity water (less than 2 parts per million of total dissolved solids) for boiler makeup.

The plant has been producing ac- ceptable water quality and quan- tity despite some materials-re- lated problems. The system design has proven to be well suited for minimizing manning and mainte- nance requirements.

Palladian Room—Session 2A

Ship Design

Moderator:

Peter A. Gale

Susan M. Lee Bales, assistant 2:30 p.m. "Technical Evaluation of the

SES-200 High Length-to-Beam

Surface Effect Ship," by John D.

Adams and W.F. Beverly.

The requirement to operate sur- face effect ships (SES) efficiently at task force speeds without com- promising their advantage of op- erating at higher speeds has been the subject of Navy research since 1970. These efforts showed that this could be achieved by selecting cushion length-to-beam propor- tions that place the high wave- making drag region known as "hump" outside the operating en- velope. Vessels with these charac- teristics are designated "High

Length-to-Beam SES."

This paper describes an exten- sive program undertaken by NAV-

SEA to validate this research and demonstrate high length-to-beam

SES capabilities. Under this pro- gram, a 110-foot commercial SES was procured and stretched from a length-to-beam ratio of 2.65 to 4.25 by installing a 50-foot hull extension amidships. This vessel is the SES-200; it is the only large high length-to-beam SES in the world.

April 1, 1984 3:15 p.m. "The CONFORM Program—An

Update," by Kenneth B. Spauld- ing Jr.

This paper provides a progress report on the NAVSEA Surface

Ship Continuing Concept Formu- lation (CONFORM) Program, first introduced to the Society at ASNE

Day 1981 by Cdr. Michael R.

Terry, USN. Since that time the program has produced many de- signs, achieved significant visibil- ity and influence, and evolved in character. Designs and problem areas are summarized, and the fu- ture potential of the program discussed. 4:00 p.m. "Combatant Ship Design Guid- ance Through Mission Effective- ness Analysis," by Dr. Dean A.

Rains.

A combatant ship design tech- nique is described that provides guidance for new designs and can assist in evaluating current de- signs and their revisions. The technique attempts to provide de- sign evaluations by comparing competing designs in a mission performance context. For a se- lected mission, a number of ship alternatives are selected for study.

Task groups are then selected to (continued on page 52)

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