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LINN 
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Figure 4. 
3.2 Anchor Castings 
Castings offer a unique problem not only because of their 
size, shape, and weight but also because of the 
dimensional instability of the forging process. The Port 
Anchor Bolsters in the Arleigh Burke Class of destroyers 
is a prime example of this. The accuracies required of the 
outside face of the casting to perform the function of 
receiving and storing the anchor is readily achieved by 
the shape of the mold at the time of pouring. The problem 
lies in the fact that as the casting cools the dimensional 
stability is somewhat unpredictable. This results in 
structural location and perimeter edge contour 
inconsistencies. This deviation (from design dimensions 
as well as from casting to casting) makes installation 
difficult because the use of templates or patterns to 
establish the deck and sideshell cutouts is not practical. 
  
Figure 5 
269 
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B5. Vienna 1996