Describe the course as a personal and team management and communication master class involving study of the management of human performance under physical and mental stress. Don't mention aircraft. The reason it is so expensive is that you will be trained by a team of highly qualified specialists using specialist equipment to expose you to situations requiring rapid and accurate decision making while under stress. Don't mention aircraft, but perhaps mention that your proposed course has been shown to have more effect on management outcomes than basket weaving.
(the nearest I came to pulling off such a stunt was getting a very nice bean to cup coffee maker for the IT team by describing it as a Java Compiler. This will be a whole new league, let us know how you get on.)