Seacor Smit Inc., the provider of offshore marine services to the oil and gas industry, filed on Monday with the Securities and Exchange Commission to periodically sell up to $200 million in common and preferred stock, debt securities and warrants. The Houston-based company plans to use the net proceeds for general corporate purposes, it said in the shelf registration filing. Under a shelf registration, a company may sell securities from time to time in one or more separate offerings in amounts, at prices and on terms to be determined at the time of sale.