Well, you can see, if you look close, that here hull is made to break ice.
http://maasmonding.web-log.nl/photos/uncategorized/a_esperanza_sb_zijkant.jpg (http://maasmonding.web-log.nl/photos/uncategorized/a_esperanza_sb_zijkant.jpg)
Just look at the bow.
But, if you look at the website of greenpeace, you can see that it is a fire fighting vessel
http://www.greenpeace.org/international/about/ships/the-esperanza (http://www.greenpeace.org/international/about/ships/the-esperanza)