WI 401 X-BAND SPERRY TECH SUPPORT.doc

USS MIGUEL KEITH

(ESB-5)

1.0 ABSTRACT

1.1 This work requirement describes the requirement to provide the Original Equipment Manufacturer (OEM) for the Sperry Marine X-Band radar system onboard the ship. Conduct repairs to restore the system fully- operational.

2.0 REFERENCES: None.

3.0 ITEM LOCATION/DESCRIPTION:

3.1 3CM “X” Band Radar Aft MFR: Sperry Marine

4.0 GOVERNMENT FURNISHED MATERIAL/EQUIPMENT/SERVICE:

4.1 Equipment: None

4.2 Services: None

5.0 NOTES:

During normal operations, the aft x band radar monitor displayed low visibility on the screen. It appeared that the system failed to display targets, after system restart the system showed targets but eventually the targets disappeared from the display and the chosen targets were never displayed. After opening the x band antenna pedestal for inspection, there was a strong scent as if there was a component overheating. The PMU and the low noise front end module were both hot to the touch, there may be possible damage to the PMU and low noise front in module due to possible power supply failure, high power transmit / receive module density or high ambient temperatures. Also on there appears to be a fault indication on LED D12 in which is flashing red, LED D12 is not listed in technical manual alarm / fault index. It is suspected as a possible communications failure due to PMU malfunction.

6.0 QUALITY ASSURANCE REQUIREMENTS:

6.1 To the satisfaction of the Chief Engineer, Port Engineer and technical specifications.

7.0 STATEMENT OF WORK REQUIRED:

7.1 The Contractor shall provide the services of a Sperry Marine certified technical field service rep to repair the ships X-Band Radar. Procure and replace a suspected damaged parts (PMU and Power supply) based on the ship’s observation.

7.2 Coordinate with the Chief Engineer for the isolation and lock-out / tag-out of any equipment or systems. Prevent the potential risk of being struck by the rotating antenna while men are aloft. Turn off the radar power switch before servicing the antenna unit. Post a warning sign near the switch indicating men are aloft and it should not be turned on while the antenna is being serviced.

7.3 All work shall only be accomplished by experienced and qualified personnel. They are also to be trained in radar and electrical safety to avoid personnel injury. As such, the worker must be fully aware of the risks associated with his surroundings and be fully knowledgeable of health and safety standards.

7.4 Visually inspect the physical condition of the antennas, processors, monitors, control stations, wave-guides and wiring for any damage, corrosion, contamination, deterioration or signs of overheating.

7.5 Open antenna covers to check terminal strips and plug connections inside. Check for loose connections and contacts and plugs for proper seating. Inspect the rubber gaskets on these covers for deterioration.

7.6 Inspect the Antenna drive mechanism.

7.7 Check processors, monitors and control stations for loose connections and contacts and plugs for proper seating. Verify all grounds straps and cable shielding are secure and in good condition.

7.8 Replace the following components:

7.8.1 PMU

7.9 Check and adjust alignment with ships Gyro systems. The accuracy of azimuth alignment of the radar presentation should be within 0.5°.

7.10 Test, inspect and verify proper operation of all features, warnings and alarms of the RADAR systems using Manufacturer and IMO requirements as guidance. To include:

7.10.1 Display Mode: True Motion, North Up and Course Up

7.10.2 Independent, Interswitch and Repeater modes

7.10.3 Range Scales and Range Rings

7.10.4 Auto and manual target acquisition

7.10.5 Range and Bearings

7.10.6 Range detection see Table 2 below

7.10.7 Target Tracking

7.10.8 ARPA

7.10.9 AIS

7.10.10 Closest Point of Approach (CPA) and predicted Time to CPA (TCPA)

7.10.11 Target Data: actual range of target, actual bearing of target, predicted target range at the CPA, predicted time to CPA (TCPA), true course of target, true speed of target

7.10.12 AIS Target Data: ship’s identification, navigational status, position, range, bearing, COG, SOG, CPA and TCPA.

7.10.13 Operation with SARTs and RADAR beacons

7.10.14 Watch Zones (infringe limits)

7.10.15 Target Trails

7.10.16 Heading Lines, Electronic Bearing Lines (EBLs) and Parallel Index lines (PI)

7.10.17 Routes and Waypoints

7.10.18 Collision avoidance

7.10.19 Operational Alarms

7.10.20 Display of Charts (if applicable)

7.11 Provide a condition report to the OMT REP by individual RADAR summarizing all as found conditions to include running hours and revision of software and any recommended parts and repairs.

7.12 Upon approval, reinstall all access panels and covers using existing fasteners leaving the RADARs in a ready for service condition. The OMT REP and Chief Mate shall inspect the RADAR antennas prior to reinstalling any covers.

7.13 Upon completion of repairs, adjustments and tests optimize and tune the systems. Demonstrate satisfactory operation of the ship's RADAR systems to the OMT REP, Captain and Navigator.

7.14 Reports

7.14.1 When inspection, service and testing reveal any deficiency a condition report is to be submitted to the OMT REP with recommended repairs and parts required. Submit three (3) typewritten copies and one (1) electronic copy in Portable Document Format (PDF).

7.14.2 Submit a report that includes “as released” condition of the radar systems. Submit three (3) typewritten copies and one (1) electronic copy in Portable Document Format (PDF).

7.14.3 All reports and checklists are to be completed and signed by the person who carried out the inspection and maintenance work and countersigned by the Company’s representative.

7.15 Manufacturer's Representative

7.15.1 Provide the services of a Manufacturer’s Authorized Technical Representative to perform all system tests and adjustments to ensure proper operation of the RADAR systems using manufacturer’s performance specifications as guidance.

7.15.3 Preparation of Drawings: None additional.

8.0 GENERAL REQUIREMENTS: None additional.

ENCLOSURE 2.2.1 - TABLE 2 of Reference 2.1.3, Minimum Detection Ranges in Clutter-free Conditions

(NM)

S-Band

(NM)

Small vessel of length 10 m with no radar

Reflector

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