tive features in regard to fouling. These re- 

 gions are numbered in approximately the order of 

 their relative severity. 



"Before filling out the table on the reverse 

 side, jot do"wn in chronological order the areas 

 in which the vessel has moored since last undock- 

 ing. Then group together all successive moorings 

 which were in the same area. 



"For example, if a ship which has been 

 operating out of Boston in area 8 makes 

 test runs off Rockland and then returns to 

 Boston, all the time moored in either port 

 is included in the time spent in mooring 

 area 8. 



"But if the ship makes a shakedown 

 cruise to Guantanamo, the fouling organ- 

 isms which may have attached in area 6 

 are exposed to different conditions, es- 

 pecially of water temperature. This may 

 cause them to die while other organisms 

 may attach. Upon the return to mooring 

 area 8, the tropical fouling is exposed 

 to temperate zone conditions, and may in 

 turn die. Hence mooring during the suc- 

 ceeding operating period in area 8 should 

 form a new line in the table. 



"The five longest mooring areas should then be 

 rearranged in order of their relative duration 

 for insertion in the table. Be sure to include 

 the names of the months in which these moorings 

 took place. " 



25 



