3.5.3 Paint Use by Vessel Type (Use Category) 



Table 3.7 is a summary of types of painted vessels by use. The estimate 

 of 260,710 recreational vessels outnumbers all other types of use. 

 Eliminating TBT paint from recreational boats would eliminate 93% of the 

 individual sources of TBT to the environment. However, recreational 

 vessels are not uniformly distributed. The Atlantic Coast contains 42% of 

 the recreational fleet, the Pacific Coast 28%, and the Gulf Coast 29%. 



3.5.4 Paint Use by Region of Boating Activity 



Fouling intensity increases with water temperature and length of the 

 boating season. There are substantial differences in the fouling 

 intensity depending on the level of nutrients in the water. Different 

 paint formulations are available for use in the temperate regions and in 

 the tropics. Table 3.8 lists formulations used in the different regions 

 of the U.S. 



111-15 



