The total area of land at HM Naval Base Portsmouth is some 383 acres. The proportion of land allocated at the naval base for museum and heritage purposes is 3.6 per cent. (13.87 acres); for VT Group Shipbuilders it is 8.5 per cent. (32.65 acres); and for operational purposes it is 87 per cent. (335.5 acres). In addition, 0.3 per cent. (0.98 acres) of land is allocated to BAE Systems. The figure for land required to support operational requirements includes two ship basins, the Royal Marines School of Music, and sports facilities required to prepare Royal Navy personnel for operations.