Tidewater Inc. Stockholder Assistance Duplicate Mailings Stock Exchange Form 10-K Report Website and E-mail Alerts Investor Relations If you receive duplicate mailings of shareholder materials, you can help eliminate the added expense by requesting that only one copy be sent.  To eliminate duplicate mailings, contact the Company’s Stock Transfer Agent and Registrar listed above. Information about stockholder accounts may be obtained by contacting the Transfer Agent and Registrar for Tidewater’s common stock, Computershare Trust Company, N.A., P.O. Box 43078, Providence, RI 02940-3078, phone: 781-575-3170 or 1-800-730-4001. General stockholder  information is available on the Computershare website, www.computershare.com.  Tidewater’s common stock is traded on the New York Stock Exchange under the symbol TDW. Tidewater’s 2010 Annual Report on Form 10-K may be obtained without charge by contacting the Company’s Investor Relations  Department at corporate headquarters. Tidewater’s SEC filings can also be viewed online at the Company’s website, www.tdw.com. Information concerning the Company, including quarterly financial results and news releases, is available on the  Company’s website at www.tdw.com. E-mail alerts about the Company’s news releases, SEC filings and presentations  are available by registering at the Company’s website. Requests for information concerning the Company should be directed to the Investor Relations Department using the address or phone numbers listed below.  Requests for information can also be submitted at the Company’s website, www.tdw.com. 601 Poydras Street, Suite 1900 New Orleans, Louisiana 701 30 Toll Free: 1-800-678-8433 Phone: 1-504-568-1010 Email: connect@tdw .com Web: www.tdw.com