XML 45 R30.htm IDEA: XBRL DOCUMENT
v2.4.0.6

NATURE OF BUSINESS (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2011
Nature of business [Abstract] |
Our Fleet | Our current fleet consists of 20 double-hull Suezmax tankers and all our vessels are employed in the spot market.
Vessel | Yard | Built | Deadweight tons | Delivered to NAT
Nordic Hawk | Samsung | 1997 | 151,475 | October 1997
Nordic Hunter | Samsung | 1997 | 151,400 | December 1997
Nordic Freedom | Daewoo | 2005 | 163,455 | March 2005
Nordic Voyager | Dalian New | 1997 | 149,591 | November 2004
Nordic Fighter | Hyundai | 1998 | 153,328 | March 2005
Nordic Discovery | Hyundai | 1998 | 153,328 | August 2005
Nordic Sprite | Samsung | 1999 | 147,188 | February 2009
Nordic Grace | Hyundai | 2002 | 149,921 | July 2009
Nordic Harrier | Samsung | 1997 | 151,475 | August 1997
Nordic Saturn | Daewoo | 1998 | 157,332 | November 2005
Nordic Jupiter | Daewoo | 1998 | 157,411 | April 2006
Nordic Apollo | Samsung | 2003 | 159,999 | November 2006
Nordic Cosmos | Samsung | 2003 | 159,998 | December 2006
Nordic Moon | Samsung | 2002 | 159,999 | November 2006
Nordic Mistral | Hyundai | 2002 | 164,236 | November 2009
Nordic Passat | Hyundai | 2002 | 164,274 | March 2010
Nordic Vega | Bohai | 2010 | 163,000 | December 2010
Nordic Breeze | Samsung | 2011 | 158,597 | August 2011
Nordic Aurora | Samsung | 1999 | 147,262 | September 2011
Nordic Zenith | Samsung | 2011 | 158,645 | November 2011

X
- Details
Name: | nat_NatureOfBusinessAbstract
Namespace Prefix: | nat_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information regarding status of each vessel during the period. + References No definition available. + Details
Name: | nat_StatusOfEachVesselTableTextBlock
Namespace Prefix: | nat_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration