 Seacor Holdings Inc. said Monday it has agreed to be taken private by a unit of American Industrial Partners, a New York-based private-equity firm, in an all-cash deal with a value of about 1 billion, including debt. AIP will offer 41.50 a share in cash, for a premium of about 14 over Seacors closing price on Friday, and a premium of about 31 over the 90-calendar day volume weighted average price. 