Add a Single-engine Seaplane Rating to your existing Private or Commercial Pilots license in as little as three days! Train in our Lake Amphibian on Oklahoma's beautiful Grand Lake. I have booked the examiner for the following dates and they are available for you this spring : April 17th, May 22nd, June 5th or 19th. Other dates by appointment, please call. Call Steve Robinson at 918-289-3940 for details.