YWAM Liberty is the former L'Astrolabe, a French icebreaking research vessel which was used to supply the Dumont d'Urville research station in Antarctica. The vessel made regular voyages between Hobart and the Dumont D'Urville research station for fifteen years and was replaced by a new icebreaker bearing the same name in 2017.

L'Astrolabe is a French icebreaker that is used to bring personnel and supplies to the Dumont d'Urville Station in Antarctica. The vessel, built by Chantiers Piriou and delivered in September 2017, replaced the 1986-built vessel of the same name.