bids are invited for ta no 4 1 flush mounting type intercom station with inbuilt visual indications for calls provision or keys for selective call - ta no 4 1 flush mounting type intercom station with inbuilt visual indicarions for calls provision or keys for selective call point to point all call and relay for automatic muting of connected external speaker and socket for connecting hand held ptt microphone , ta no 4 2 hand held ptt microphone with std length of cable and mounting bracket , ta no 4 3 bulkhead mounting type 4 watt cabin type loudspeaker with cable entry glands , ta no 4 4 ip 56 bulkhead mounting intercom station with inbuilt visual indication for calls provision or keys for selective call - ta no 4 4 ip 56 bulkhead mounting intercom station with inbuilt visual indication for calls provision or keys for selective call point to point all call and relay for automatic muting of connected external speaker and socket for connecting headset with boom microphone fitted inside wt ip44 stainless steel stowage , ta no 4 5 headset with boom microphone with 10 mtrs cable and watertight plug , ta no 4 6 wt ip 56 combined audio visual signal device 100 db , ta no 4 7 wt ip 56 re entrant 10 watt horn type speaker with cable entry glands , ta no 4 8 modification of intercom rack in order to add the additional intercom stations in armanent group , ta no 4 9 making necessary cutout and arrangement in wheelhouse console for the fitment of intercom station total quantity : 72