Out Of The 14 Aboveground Product Tanks, 09 Aboveground Vertical Storage Tanks And 02 Horizontal Product Storage Tanks Are Provided With Honeywell Enraf Make Radar Level Transmitters. Multi Spot Temperature Cum Water Bottom Sensors, Tank Side Indicators, Communication Interface Units (Ci Us) And Tfms Computer Are Also Part Of Radar Level Transmitter System. Since Radar Gauges Are Primary Level Instrument For Calculation Of Product Inventory And Are Also Supercritical Interlock Instrument, It Is Required To Maintain High Level Of Availability Of The Instrument. 3. These Instruments Are Critical In Operational And Safety Requirements. Also, These Instruments Require High Skill For Maintenance And Troubleshooting, It Is Prudent To Have Its Service Annual Maintenance Contract With The Oem I.E. M/S. Honeywell As A Prive Maintenance Measure. This Will Also Maintain The Overall Remote Operability Of The Facility In Line With The Bpcl Policy And Procedures.