The Guusjen Foundation aims to tie the sea-going tugboat Holland to Terschelling in order to contribute to the preservation of a unique part of Terschelling's nautical history. Guusjen sponsors the Holland every year with a nice contribution, which she generates by recruiting Opstappers (friends), local sponsors and through the activities on board. At the invitation of Guusjen, De Holland comes to the port of Terschelling for four weeks a year, where she is accessible to both islanders and visitors from shore.