Section 26 

 TRIKimD, BRITISH WEST INDIES — U. S. MVAL OPERATIHG BASE 



A26.01 Location of the Test Station and Test Board 



A test "board of the panel type was installed July 11, 19^4, at the 

 U. S. Naval Operating Base at Trinidad, British West Indies. Within 

 a month this test hoard was destroyed inadvertently, and a new one was- 

 installed on August l6, 19^4, so that the test starts from this later date. 

 This test hoard, which was designated hy the symbol USNT-1, was installed 

 in the vicinity of untreated wood piling at Pier No. 1 (Fueling Pier). 



On November l6, 19^5* a new series of panels was installed on the 

 test hoard, in which the period of submergence was reduced from 8 to !<■ 

 months on account of the destructiveness of the Teredinidae . In August 19^7* 

 the test board was again destroyed inadvertently but was soon replaced by 

 another. Tlie operation of this last test board is being continued, 

 ajid the results have been summarized to the end of 19^7 • 



A26.02 Hydrographio Data 



The depth of water where the test board was installed was 28 ft, 

 the tidal range 2.7 ft, the velocity of the current 0.15 knot. No 

 dist\irbance of the test board was reported because of ships. In March 19^6 

 the salinity of the water was determined to be 22,250 ppm, from samples 

 taken at the test board in two separate laboratory tests. The pollution 

 appears to have been limited to an oily film on the siirface of the water, 

 which persisted until the end of 19^7- ^© following record of the 

 temperature of the water in degrees F, based on readings made about the 

 middle of each month or shortly thereafter, shows the general range at 

 this location. 



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