I'm re-posting these two ships here just for the sake of keeping all the Portuguese navy in one thread. I'll throw in some information in case anyone is interested
NRP D. Carlos I (ex-USNS Audacious, T-AGOS-11) was transferred to Portugal in February 1997. She was re-equipped for hydrographic and oceanographic duties and has been used extensively for these purposes since. She named after Carlos I, the king of Portugal who himself was quite a prominent man of marine science. Every single one of the four yachts he owned doubled as an oceanographic ship.
NRP Almirante Gago Coutinho (ex-USNS Assurance, T-AGOS-5) joined the Marinha Portuguesa in September of 1999. She's named after Portuguese vice-admiral Carlos Viegas Gago Coutinho who was not only a distinguished Navy officer but a geographer and navigator during the first half of the 20th century.
Both ships are used for both scientific studies and support during naval exercises.