M. P. Fodch 121 
Fig. 6.19. Test-and-calibration barge of Castillon, 
The mooring assembly consists of steel hawsers and nylon cables going to 
four buoys which are linked by a chain to four concrete blocks weighing one ton 
each. 
6.4.3. The Test-and-Calibration Barge 
The barge, constructed entirely of welded steel plates, consists of a roof 
house erected on a platform borne by 31 floats, three of which can be used to 
control the maintenance of a horizontal position. Witha displacement of 110 tons, 
the barge measures 17 m in length and 14 m in width. 
6.4.3.1. General Layout 
In the interior of the roof house a central hall, equipped with a monorail 
carrying a hoist, is surrounded by a space divided into office, laboratory, test 
stand, workshop, and living accommodations. 
In the back part of the hall, a test well has been installed measuring 9.70 by 
2.80 m. It is surrounded by a hatchway 10 cm high, the upper part forming a 
gliding rail for the testing and measuring apparatus connected with this well. 
By opening a gate the well can be approached by an amphibious landing craft. 
6.4.3.2. Mechanical Operating Gear 
A mast 20 m high provides the facility for handling long shafts to which the 
transducers are fixed. Other handling facilities consist of two davits with a weight- 
handling capacity of 500 kg each and a derrick with a capacity of one ton. The 
central monorail has a capacity of one ton, but it has been reinforced at the 
rear end in order to allow the hoisting of transducers weighing five tons. 
6.4.3.3. Electrical Installation 
A transformer station on the bank provides the power by means of a sub- 
marine cable. The maximum power available is 25 kw. 
