66 KAUTICAL CHART MANUAL 



FISH HAVEN (Fig. 1) 



Fish havens are artificial barrier reefs and obstructions, estabUshed to enhance fish 

 propagation in coastal waters (See Chart Letter 921/59). 



Small areas shall be shown by a dotted circle, blue tint, and labeled as follows: 



.-'-. Obstruction 

 '■■■' Fish Haven 



Large areas shall be shown by short-dashed lines, generally without blue tint, and labeled 

 thus: 



J Obstruction \ 

 \ Fish Haven > 



OIL WELL STRUCTUEES (0-0a,-0b) 



Structures estabhshed in offshore water areas for the drilhng of oil weUs shaU be charted 

 as a sohd 1.25-mm. square symbol with proper description as follows: 



1. Unnamed structure: , piatfo™ (i,ghted) 



HORN 



2. Named structure: ■ "='=' dishted) 



HORN 



(Names on the latter type structure are visible from seaward and the air, making them 

 extremely useful as privately maintained aids to navigation and for AIR-SEA rescue operations.) 



Structures shown on the 1200-series charts shall be omitted from the 1100-series. In the 

 areas so affected, the 1200-series chart limits shall be shown in magenta on the 1100-series 

 with the following explanatory note: 



CAUTION 

 Oil well structures are charted only 

 where offshore of the indicated limits 

 of the 1200-series charts. 



When oil well structures are reported to exist in confined, constricted or landlocked water 

 areas, the area shall be labeled: "Obstructions Wells and Pipelines." 



