6. Cycle the depressor at the desired frequency and amplitude. If the towcable 

 length is adjusted properly, the control flap will deflect to a maximum dive angle 

 of approximately 15 deg. If the flap dive angle is exceeding this value, towcable 

 length should be increased slightly using Figure 18 as a guide. If, however, the 

 depth cycle does not cause the flap to approach this value, the cable length should 

 be shortened. 



Turns, when required, should be made at a gentle rate. Always monitor depth 

 and tension in a turn. As long as depth is maintained and tension does not become 

 excessive, the turn rate can be judged satisfactory. If towing behavior does be- 

 come erratic, decrease the turn rate and/or the speed. 



64 



