documented. Several subsequent vehicles fol- 

 lowed NEMO'S precedent: KUMUKAHI, 

 MAKAKAI and JOHNSON SEA LINK. 



Combining both the advantages of pano- 

 ramic viewing of a sphere and the other 

 advantages offered by a cylinder, Perry Sub- 

 marine Builders developed the plastic-nosed, 

 steel-hulled PC-8 (Fig. 9.30d), the first of 



what is now five of this type vehicle. Conven- 

 tional viewports still ring the operator's con- 

 ning tower, but the forward view is greatly 

 improved over the earlier designs. Comfort, 

 though better than in its predecessors, is 

 still not the ultimate. Owing to the small 

 diameter hull a 6-foot observer must remain 

 bent forward to view. Figure 9.30d is some- 



458 



