Exhibit 16 Office of the Chief Accountant Securities and Exchange Commission 450 Fifth Street, NW Washington, D.C. 20549 March 29, 2002 Dear Sir/Madam: We have read the first three paragraphs of Item 4 included in the Form 8-K dated March 28, 2002, of Mississippi Power Company to be filed with the Securities and Exchange Commission and are in agreement with the statements contained therein Very truly yours, /s/ Arthur Andersen LLP - ------------------------ Arthur Andersen LLP Copies to: Mr. Michael D. Garrett, CEO, Mississippi Power Company Mr. Michael W. Southern, CFO, Mississippi Power Company Mr. Gale E. Klappa, CFO, Southern Company