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Exhibit 12.1

RATIO OF EARNINGS TO FIXED CHARGES

        The following table presents our ratios of earnings to fixed charges in accordance with U.S. GAAP for the periods indicated

For the Year Ended December 31, For the Six Months Ended
(unaudited)
(U.S. Dollars in thousands, except per share data) (U.S. Dollars in thousands,
except per share data)
2006
2005
2004
2003
2002
June 30,
2007

June 30,
2006

 
Earnings (1)     $ (1,028 ) $ (8,517 ) $ (33,467 ) $ 14,333   $ (37,380 )   (6,974 )   6,164  
Fixed Charges       5,154     5,257     4,880     5,554     8,693     4,681     1,696  







Earnings
(insufficient
earning to cover
fixed charges)
    $ 4,126   $ (3,260 ) $ (28,587 ) $ 19,887   $ (28,687 ) $ (2,293 ) $ 7,860  
Fixed charges:    
  Interest       5,134     5,257     4,880     5,531     8,653     4,547     1,696  
  Amortization of    
debentures expenses       20     --     --     23     40     134     --  







  Fixed charges     $ 5,154   $ 5,257   $ 4,880   $ 5,554   $ 8,693   $ 4,681   $ 1,696  







Ratio of earnings    
(deficit) to fixed    
charges (2)       0.80:1     (0.62:1 )   (5.86:1 )   3.58:1     (3.30:1 )   (0.49:1 )   4.63:1  








(1) "Earnings" consist of consolidated income (loss) from continuing operations (including dividends from less than 50% owned affiliates) before income taxes, equity in earnings of affiliates, and minority interests.

(2) The ratio of earnings to fixed charges represents the number of times "fixed charges" are covered by "earnings."