Section 56 

 BRISBANE, AUSTRALIA — U. S. NAVAL OPERATIIJG BASE 



A36.01t Location of the Test Station and Test Board 



A test toard of the panel type was operated at the U. S. Naval 

 Operating Base at BriB"bane, Australia, from July 1, 19^i)- to January 

 5, 19^5, when the hoard was discontinued because the personnel handling 

 the installation were assigned to other activities and other locations, 

 and the Base no longer maintained or operated waterfront facilities. 

 The test "board, designated hy the symbol USNBA-l, was installed at the 

 upstream end of the wharf at the Colonial Sugar Refinery Co., Ltd., in 

 the Brisbane River, approximately 9 miles from Moreton Bay and 20 miles 

 from the open sea. 



A56.02 Bydrographic Data 



The depth of water at the location where the test board was 

 installed was 18 ft at low tide. There was an avei-age tidal range of 

 6 ft and a maximum of 7^ ft. The maximum strength of the current was 



5 knots during ebb and flow tide. The mean temperature of the water was 

 given as 70° F. The degree of pollution was considered inconsequential. 

 It was stated that there was an average of 50 vessels in the river but 

 no city sewage. The water was reported to be muddy at all times. 



A56.O5 Marine Borers 



1. Teredinidae . Teredinidae , including Bankia ( Hausitora ) sp. 

 and Teredo sp,, were active from September to the end of 19^, when 

 the test was discontinued. They occurred as embryonic specimens in 5 

 of the 6 control panels, the last 2 psuiels not being received. The 

 breeding season extends from September to at least Itecember, and probably 

 longer. Teredinidae also occurred in the last 6 of the 8 test panels, 

 which had been submerged from 5 to 8 months, respectively. The maximum 

 lengths recorded in these panels ranged from 8 mm in 3 months, 10 mm in 



k months, 25 mm in 5 months, to 75 mm in 6 months. The maximum number 

 recorded was from 25O-3OO up to 75 mm long in a panel submerged for 



6 months. While this test was not conducted long enough to provide 

 conclusive information regarding the breeding season and the development of 

 marine borers and fouling organisms at this location, it is certain that 

 Teredinidae were present in destructive numbers and, accordingly, the 

 attack was rated as very heavy. 



2. Llmnoria . No Limnoria or other crustacean borers and no 

 Pholadldae were found in any of the panels. 



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