Section 8 

 NEW L0KD6n, COKKECTICUT -- U. S. NAVAL STIBMAEIKE BASE 



A8.01 Location of the Test Station and Test Board 



A test "board of the panel type was- installed at the U. S. Naval 

 Suhmaxine Base at New London, Connecticut, on June 10, 19^k, in the 

 Thames River north of the Base proper and adjacent to the l800-ton 

 wooden floating drydock. The results frcan this test hoard, the operation 

 of which is still heing continued, have heen summarized to the end of 

 19^7. In November 19h^, after 15 panels had heen sent in to the laboratory, 

 the test hoard was lost because of dredgixig operations and a new one 

 was installed; on the latter test board, exposure of the panels was 

 reduced from 8 to i+ months on account of the severity of the Teredo 

 attack at this location. This test board was located at the end of Pier 

 1 at the south end of the Base. 



A8.02 Hydrographic Data 



The depth of water where the test board originally was installed 

 was given as kO ft, but the depth of water where the replacement board 

 was installed on November 20, 19^5, was given as 55 ft. The tidal range 

 was 5 f't; the strength of the current was reported to be weak, irregular, 

 and unpredictable. The mean temperature of the water was given as 60° F 

 and the salinity (total solids) as 12.70 grams per kilogram. The specific 

 gravity of the water was given as 1.0105 and the chlorinity (determined 

 as chloride ion) as 7-^7 grams per kilogram. The river wp,s reported.. to 

 be moderately polluted with sewage and oil. 



A8.O5 Marine Borers 



1. Teredinidae . Teredinidae ( Teredo navalis ) occurred sporadically 

 each year on the control panels, the breeding season being limited to 

 the warmer months from the middle of July to, the middle of October. During 

 19^^ and 19^5 J "the specimens ranged from embryonic up to U mm in length and 

 from 500 to 600 per panel. During I9U6 and 19^7, only one to I5 minute pits 

 per panel were recorded. Teredinidae were recorded in 21- of a total of 

 kO test panels; 7 of these panels were riddled, some panels in as short 

 a period as k months. Specimens up to I85 mm in length were recorded in 

 k months in these riddled panels. Panels were riddled in 19^^, 19^5; 

 and 19^7 > "the attack rating very heavy in these years but being less severe 

 in 19h6. 



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