The strength of the Gambian Navy is estimated at between 125 and 250 personnel. It exists to enforce fishery legislation and regulation, and assistance has been given in that task by the Senegalese Navy. In February 2008, officers of the US Navy helped to install an automatic identification system in the Gambia called the Maritime Security and Safety Information System (MSSIS). In September 2011, a team from the HSV-2 Swift docked in Banjul to conduct a two-week intensive training programme for the Navy. In August 2013, Taiwan donated three new patrol vessels to the Gambia to replace the four ageing vessels of the Dvora-class that it donated in 2009.