Ultra Electronics has won a contract to supply advanced sonar systems to the Royal Netherlands Navy.The contract has been won by the defence industry supplier's Maritime Systems business, which is based in Nova Scotia, Canada.The contract is worth C$25m.Two multi-static active passive sonar (MAPS) systems will be fitted to the Royal Netherlands Navy's M-class frigates as part of an upgrade process to prepare them for operating new NH-90 helicopters. Each MAPS system includes an acoustic projector and receive array together with handling equipment to allow deployment and recovery of the sonar while the ship is under way. The first MAPS system will be delivered in 2011."This contract is another example of Ultra positioning its specialist capabilities on international platforms and programmes and broadening its customer base," said Douglas Caster, chief executive of Ultra Electronics.