FORT LAUDERDALE, FL (MARKET WIRE) SEACOR Holdings Inc. (NYSE: CKH) announced today that its Board of Directors has increased by $82.6 million its authorization for repurchases pursuant to its previously announced securities repurchase program. With this increase, SEACOR has approximately $100 million available for such purchases. The securities covered by the repurchase program include SEACOR's common stock, its 7.2%