Table 2, Comparison of Proposed Designs of the Towing Assembly 



Towing 

 Assembly 



Advantages 



Disadvantages 



Figure 2A 



1. 



Self-floating. 



1 . None. 





2. 



Paravane counteracts the 

 vertical component of the 

 towline force. 







3. 



Roll damping plate. 





Figure 2B 



1. 



More compact than that of 



1. Not self-floating. 







Figure 2A. 



2. Flexibility of towing 





2. 



One end of boom connector 



bridles (could make it 







used as tow plate without 



difficult to attach under 







addition of paravane 



field conditions). 







foot. 





Table 3. Comparison of Proposed Designs of Bulkhead Attachment 



Attachment 



Advantages 



Disadvantages 



Figure 3 



1. Simple construction. 



2. Same structural components 

 as boom connector in Fig- 

 ure 1A. 



3. Rotational flexibility 

 about vertical axis, 

 minimizing bending loads 

 in tidal fluctuations. 



1 . None. 



Figure 4 



1 . Already marketed commer- 



1 . Construction is more 





cially. 



complicated than that 

 of Figure 3. 



2. Rotational flexibility 

 about the roller track 

 is quite limited. 



30 



