Translation of frigate in German

Then we did a boat trip which started somewhere in the delta and ended somewhere else in the delta. Each couple received a boat and an elderly lady had to row. I did not feel comfortable with that.
I am learning Spanish in university but I also have to improve it for private reasons. Do you have any suggestions. It is giving me a hard time lately as it is difficult. I need to be very patient.
Needless to say, Machu Picchu has earned its reputation and was definitely one of the highlights of our journey: We took the train to Aguas Calientes in the early morning.