1. Proce- dure
2. Procedure
3. Execute procedure; Coordinate manipulations Basic piloting skills complex,the interface must showthis complexity. In effect,the dangerarisesthat the interfacewill becomecluttered and too difficult to work with. To compensate, conventionalapproachesto interface and system design often suggest automation to simplify the interface and/or the tasks, but this can have negative side effects as well.61-65Hence, some sort of automation might be inescapable to promote effective human-machine interaction through ecological interfaces. The question remains `how' and `to what extent' automation should be involved and reflected on the ecologicalinterfacetoeffectivelypromotepilotSA, decision-making,andflight safety. Togainmoreinsightintothis issue, a command-based SVD alternative was designed and used in the experiment, as discussed in the companion paper.35