Section 27 

 BAHIA, BRAZIL — U. S. NAYAL AIB AMD U. S. UAVAL OPERATHKJ FACILITIES 



A27.01 Location of the Test Stations and Test Boards 



Test boards of the psmel type were operated at the U. S. Haval Air 

 Facility and at the U. S. Naval Operating Facility at Bahla, Brazil. The 

 "board operated at the first facility, designated by the symbol USKBB-l, was 

 installed June 28, 19M«-. This board was lost overboard on Efeeember 2 after 

 it had been in operation for only k months. A diver was sent down, but the 

 board had broken loose from the anchor, and only the latter was recovered. 

 A new board with panels 2 Inches thick was installed on December 9. 



The test board operated at the second facility, designated by the 

 symbol USIIBB-2, was installed -June 25, 19^. The operation of this board 

 £l1so was interrupted, after it had progressed only k months, in order to 

 change to panels 2 inches thick. The operation of both test boards was 

 discontinued at the end of June 19^5 because of the decommissionlDg of both 

 these facilities. Ho details els to the exact location of either board were 

 given, although the two facilities were said to be about 12 miles apart 

 by water. It was also stated that the board at the second facility had been 

 installed at the small boat pier there and that this location was in the 

 harbor in the vicinity of untreated wood piling. As the development of 

 marine borers and fouling organisms was essentially the same at both 

 locations, a single report is presented to show the conditions which may 

 be expected in this harbor. 



A27.02 Hydrographic Data 



1. USKEB-l (U. S. Navea Air Facility ). The depth of water where 

 this test board was Installed was 18 ft, the tideO. range 9 ft, the 

 current 2g- knots. The temperature of the water was 80° F in June 19^ > 

 when the test board was Installed, and the same temperature in early December 

 of the same year, when this board was lost and replaced by a new one. 

 Pollution was Jiegliglble. 



2. USIIBB-2 (U. S. Naval Operating Facility ). The depth of water 

 where this test board was Installed was 10 f-^-, at low tide, the tidal range 



8 ft; there was no appreciable current. The temperature of the water at the 

 time of installation was 80° F. The pollution was of the usual harbor type. 



A27.05 Marine Borers 



1. Teredlnldae . Teredinldae , including Bankla canal is , B. caribbea t 

 B. katherinae . B. zetekl> B. sp.. Teredo dlsconus , T. ( Lyrodus ) sp., T. 

 TPsHo teredo ) sp., and T. sp., were very active at both locations throughout 

 the period covered by the tests. Because of the destructiveness of the 



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