Technical diving is leading the way in scuba diving equipment innovation and gear refinement. It takes time, but this progress is slowly trickling down into recreational diving. This can be seen by the introduction of wings, backplates, and harnesses into entry-level courses. Tec divers learn how to develop skills with the use of long hoses, developing higher level skill with trim and position in the water. The technical divers of the world focus on uncluttered equipment set up and streamlining, allowing them to respond to emergency situations such as out of gas emergencies with ease and flexibility.