Gerund

AS
1. Subject
Navigating is an art
2. Predicate / object
The duty is starting the machine

After
1. Articel (the,an,a)
The calling for help is clearly heard
2. Demonstrative (this, that, those)
This crying annoys the crew
3. Possesive
His problem solving is very impressive
4. The Verbs
5. The exspressions