An item reported that as a result of an ministerial order dated 21 February 1905 no. 50 the navy yard at Amsterdam, Netherlands was ordered to built the 5th steam pilot vessel. She was named Reserve by ministerial order dated 28 August no. 48. Laid down on 26 May 1905 and launched on 19 September. With the panelling was already started and with the placing of engine and boiler was to be done as soon as possible.