Table B-6. Response Characteristics of a T-2 Tanker'' 



Ship Speed 

 (knots) 



1/3 Highest Amplitude 



1/10 Highest Amplitude 



Pitch 

 (degrees) 



Heave 

 (ft) 



Pitch 

 (degrees) 



Heave 

 (ft) 





 5 



10 

 15 



0.78 

 0.92 

 1.11 

 1.10 



0.77 







1.06 



0.97 

 1.17 

 1.42 

 1.40 



0.98 

 1.35 



^ Reference 34, p. 5 



A conclusion reached from the above is that a T-2 tanker or a ship of 

 similar size would safely support a pipe string— load combination in all but 

 the severest sea states. There is some question whether the equipment 

 necessary to handle and support the pipe string could be installed on the 

 tanker. Up to the present, T-2 tankers used for heavy-lift operations have 

 used cable-winch systems to lower the load. It would appear at first glance 

 that it would be no more difficult to install pipe handling equipment on the 

 T-2 than on the Cuss I. Therefore, a T-2 tanker or comparable ship would be 

 worthy of serious consideration in the heavy-lift project. 



Response of the C1-M-A Vl^^ 



The C1-M-A Vl has been analyzed in some detail for use as a deep 

 ocean drilling ship. This ship was at one time considered ideal for a test bed 

 for the MOHOLE project. Its response would be very much the same as 

 present drilling ships. The pertinent specifications are as follows: 



Length 



Beam 



Full load displacement 



338 feet 

 50 feet 

 7,400 tons 



The wave amplitude spectrum describing a specific sea condition is 

 needed to calculate the ship response spectra. Assuming a fully developed 

 sea with a 20-knot wind, the following values can be determined: 



130 



