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PROPERTY AND EQUIPMENT (Tables)
6 Months Ended
Sep. 30, 2012
Property, Plant and Equipment [Abstract]  
Schedule of property and equipment
Property and equipment are comprised of the following:

    
 
September 30, 2012
 
March 31, 2012
Cost
 
 
 
Vessels
$
255,264

 
$
238,830

Leasehold improvements
3,782

 
3,847

Furniture and equipment
339

 
335

Vehicles
23

 
21

Computer, communication equipment and purchased software
2,901

 
2,878

 
$
262,309

 
$
245,911

Accumulated depreciation
 

 
 

Vessels
$
42,510

 
$
42,426

Leasehold improvements
1,266

 
1,034

Furniture and equipment
182

 
162

Vehicles
13

 
12

Computer, communication equipment  and purchased software
1,589

 
1,415

 
45,560

 
45,049

 
$
216,749

 
$
200,862