TIDEWATER INC. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS Years ended March 31, 2010, 2009, and 2008  (13) SEGMENT INFORMATION, GEOGRAPHICAL DATA AND MAJOR CUSTOMERS  The company follows the disclosure requirements the Segment Reporting Topic, ASC 280, and operates in  two business segments: International and United States. Operating business segments are defined as a  component of an enterprise which separate financial information is available and is evaluated by the chief  operating decision maker in deciding how to allocate resources and in assessing performance. The  following table provides a comparison of revenues, operating profit, total assets, and depreciation and  amortization and additions to properties and equipment for the years ended March 31. Vessel revenues and  operating costs relate to vessels owned and operated by the company while other marine revenues relate to  the activities of the company's shipyards, brokered vessels and other miscellaneous marine-related  businesses. (A) Marine support services are conducted worldwide with assets that are highly mobile. Revenues are principally derived from offshore service  vessels, which regularly and routinely move from one operating area to another, often to and from offshore operating areas in different continents. Because of this asset mobility, revenues and long-lived assets attributable to the company's international marine operations in  any one country are not material. Equity in net assets of non-U.S. subsidiaries is $2.4 billion, $2.1 billion and $1.5 million at March 31, 2010,  2009 and 2008, respectively. Other international identifiable assets include accounts receivable and other balances denominated in  currencies other than the U.S. dollar, which aggregate approximately $1.4 million, $1.4 million and $6.8 million at March 31, 2010, 2009,  and 2008, respectively. These amounts are subject to the usual risks of fluctuating exchange rates and government-imposed exchange  controls. F-40 (In thousands)  2010 2009 2008 Revenues:  Vessel revenues: International (A) $ 1,048,553 1,209,426 1,055,339 United States 89,609 146,896 159,795 1,138,162 1,356,322 1,215,134 Other marine revenues  30,472  34,513  55,037  $ 1,168,634 1,390,835 1,270,171 Vessel operating profit:  International $ 252,354 437,695 394,789 United States 9,196 34,797 29,985 261,550 472,492 424,774 Corporate expenses (51,432) (38,622) (40,974) Gain on asset dispositions, net  28,178  27,251  11,449  Other marine services 2,034 4,348 6,776 Operating income  240,330  465,469  402,025  Foreign exchange gain (loss)  4,094  2,695  (891)  Equity in net earnings of unconsolidated companies  18,107  16,978  14,470  Interest income and other, net  6,882  7,066  16,957  Interest and other debt costs  (1,679)  (693)  (6,992)  Earnings before income taxes  $  267,734  491,515  425,569  Total assets:  Marine: International (B) $ 2,781,444 2,538,417 2,089,941 United States 334,182 394,128 387,432 3,115,626 2,932,545 2,477,373 Investments in and advances to unconsolidated Marine companies  40,614  37,221  27,433  3,156,240 2,969,766 2,504,806 General corporate 137,117 104,038 246,974 $ 3,293,357 3,073,804 2,751,780 Depreciation and amortization:  Marine equipment operations  International $ 118,182 108,978 100,680 United States 10,746 15,855 18,675 General corporate depreciation  1,256  1,398  1,482  $ 130,184 126,231 120,837 Additions to properties and equipment:  Marine equipment operations  International $ 414,504 444,349 326,655 United States 35,956 29,072 50,154 General corporate 1,513 255 11,089 $ 451,973 473,676 387,898