Translation of Inbetriebnahme

I need to write you one more sentence. This is what my teacher told me and the German language is so difficult. So please, as a last favor, would you please write the sentence for me in German?
In addition, after the tests I would like to give also a presentation to some of the teachers, as usually the different ideas come with the presentation. After speaking with them, some ideas emerge...
The young women rowed towards us and tried to sell food and souvenirs. We were not interested and she tried to block us and prevent us from swimming back to our vessel. So we dove beneath her.