Mooring and Positioning of Vehioles in a Seaway 



In the present study the angle for the predominant wind direc- 

 tion was taken to be Pq = , and a variable barge heading angle, Pg, 

 introduced to allow for the relative heading of barge to wind. The 

 relationships of the wind direction, the wave heading, and the barge 

 heading are shown in Fig, 8, together with the difference angle 

 Pw - Pb representing the wave heading relative to the barge heading. 

 Also shown in this figure are the conventions made use of later for 

 the designation of the forces in the mooring cables and the azimuth 

 angle for the boom used to lower loads from the barge. 



VECrOR WAVE 

 PROPACATIOM DIKECnON 



X ^PREDOMINANT 

 WIND DIRECTIOM 



DIRECTION Of 

 BAK6E HEADING 

 (RELATIVE TO 

 PReDOMlHANT wind) 



Fig. 8. Orientation and relations between barge, wind and waves 



1045 



