t 





Figure 3. — View of boom and block, upper left (also see Fig. 2), on R/V Jordan. Plankton net tow 

 in progress. Telemetering inclinometer (see also Fig. 8 and 9), used to indicate wire angles, hangs 

 from towing wire. Slack in wire indicates that the net is being lowered. Man on right is the winch 

 operator at winch console, close to rail where he can watch net operations during launching and re- 

 trieval. Man on left will record wire angles when net is retrieved (see plankton tow procedure). 



