Translation of fertilize in Spanish

We wanted to take a hot shower but there was no hot water at all. We asked someone to fix it and he showed us that there was a heating switch outside the bathroom which would turn on the boiler.
When we arrived at the port, or whatever it was, we were a little scared since the boats were very old and dirty. We entered the boats anyway and hoped for best. The boat driver started the engine.
We first took a regular bus to the border, which was basically just an empty building. There we switched to Jeeps, as the terrain was rocky. In our group there were 4 American girls and us.