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what and the dock will rise above the level of the ice. The entire ice 

 cup of the dock will, so to speak, be pressed out above the surrounding 

 field. During the repair of the Temp^ the dock rose 44 inches. 



The repairs on the vessel were carried out simultaneously with the 

 building of the dock. As the workmen dug deeper and deeper into the 

 ice, they repaired whatever defects of the ship's hull they encountered. 

 The Temp underwent the following repairs : replacement of a worn-out 

 screw, repair of a bent rudder, and setting of a new false keel. During 

 the second wintering in the ice dock, a complete repair of the under- 

 water part of the ship was carried out. 



As the ice cup was being hollowed out, the vessel was placed on 

 wooden cross-beams, while the ice buttresses dividing the sections were 

 being cleared away. It was then possible to paint the hull and tar the 

 underwater parts. 



Shifting of the ice in spring is very dangerous and may damage a 

 ship caught in the midst of drifting ice fields. If, after completion of 

 repairs, the ice dock is flooded, the ship floats in a basin with exceed- 

 ingly thick walls protecting it from shocks and pressure. When the 

 ice thaws out and the ring encircling the ship finally breaks, the vessel 

 will find itself in water more or less clear of ice. If the ice ring fails to 

 break up in time, it may be blown up with explosives. 



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