EXHIBIT 16.1 [Arthur Andersen LLP Letterhead] June 24, 2002 Office of the Chief Accountant Securities and Exchange Commission 450 Fifth Street, N.W. Washington, D.C. 20549 Dear Sir or Madam: We have read the second and third paragraphs of Item 4 included in the Form 8-K dated June 18, 2002, of Oceaneering International, Inc. to be filed with the Securities and Exchange Commission, and are in agreement with the statements contained therein. Very truly yours, Arthur Andersen LLP cc: Mr. Marvin J. Migura Senior Vice President and Chief Financial Officer Oceaneering International, Inc.