y 1 
INVITED PAPER 
ade PREDICTING THE FIT 
OF 
SHIPS BUILT IN HALVES 
John F. Kenefick D. Douglas Peel 
JFK, Inc. Sun Shipbuilding and 
P.0. Box 3556 Dry Dock Co. 
‘ Indialantic, Florida 32903 Chester, Pa. 19033 
U.S.A. B.S.A. 
v ABSTRACT 
The ease and cost with which halves of a ship may be joined depends 
© largely upon the dimensional equivalence of the mating faces. Advance 
detailed knowledge of this equivalence before the halves are launched 
and brought together allows the builder to undertake adjustments 
and/or to plan specific joining procedures to accommodate known 
mismatches. Photogrammetry was successfully employed for the purpose 
of surveying mating faces of two 126,000 DWT tankers, both of which 
( were built in halves. These surveys provided a wealth of as-built 
dimensions of each face with a tolerance of 3/32 inch. Data for 
- mating faces were compared via computer processing to produce digital 
and graphical displays of the predicted fits. 
  
true Inter-Congress Symposium "Photogrammetry for Industry", Commission 
V of the International Society of Photogrammetry, Stockholm, Sweden, 
August 14-17, 1978