corrigendum tender for switching impulse board , racks power supply board inco spares , servovalve amplifier , diving servocontrol , cpu board set , cpu board set front and rear servo , i o bus interface board , logic 2 3 board , analog input board current , voltage analogic inputs , 4 x channel rs485 module , logic output module , vme io interface board , serial link mother board , module c633 a ssu , logic input module , current analogic , voltage analogic , ventilation fan rack 19 , cpu board set for normal monitoring , esd kit electrostatic sensitive device kit , interface test equipment including laptop software , current test adapter for echosounder , drs1 simulator tool cs 55 , tool set of adaptor seb5900 , 1 wk12 dummy load tool cs 118 , dummy load for sonar beacon, procurement of b and d spares for static converte and 25 types of additional spares, switching impulse board, racks power supply board inco spares, servovalve amplifier, diving servocontrol, cpu board set, cpu board set front and rear servo, i o bus interface board, logic 2 3 board, analog input board current, voltage analogic inputs, 4 x channel rs485 module, logic output module, vme io interface board, serial link mother board, module c633 a ssu, logic input module, current analogic, voltage analogic, ventilation fan rack 19, cpu board set for normal monitoring, esd kit electrostatic sensitive device kit, interface test equipment including laptop software, current test adapter for echosounder, drs1 simulator tool cs 55, tool set of adaptor seb5900, 1 wk12 dummy load tool cs 118, dummy load for sonar beacon