Is “ferrying” in the following passage a gerund or a present participle?
In March 2016, Zipline, a U.S. startup partnered with the Rwandan government to launch the world’s first commercial drone delivery service, ferrying vital medical supplies to far-flung hospitals by air. Since October of that year, the company has dispatched more than 7,000 units of blood products to 21 hospitals, … (TIME, May 31, 2018; https://time.com/longform/ziplines-drones-are-saving-lives/ )
If it is a participle, I think, it will make up a reduced participle clause, with the subject being “the world’s first commercial drone delivery service”. In which case, the clause may be rewritten as “which ferries vital medical supplies …”; present tense “ferries” is made necessary by the next sentence saying the service is still going on; however, tense disagreement between “ferries” and the main clause verb “partnered” concerns me.
Or, “ferrying” is a gerund?