If the weather conditions are favorable, there isn't much needed. This would have been a very stable aircraft on its own. If the controls are setup properly in advance of the runway, it will descend and "land" with little input. In all likelihood they used a long approach, strait-in, to an airfield totally cleared of all other traffic. He would have had a strait shot in from many miles away.

The important decision was to keep him following the coastline. A random aircraft over florida land would be a nightmare to locate and deal with on radar, even if the transponder was functional. Keeping him following the coastline would have made the fix much simpler.