ATTACHMENT J11 Cathodic Protection.docx

Periodicity:

Spec Code:

Berthed At:

Quarter:

NSTM 50 INSPECTION GUIDELINES

CP1

Insp Date:

TDL

Remarks N/A

NO

YES

Description Item Power supply readings have been taken and recorded and are satisfactory.

System has been checked for shorts and opens and none were found.

Have all other discrepancies been reported? If not report them here.

C/P Rectifier

1. Annode Type Installed:

2. Number of Annodes:

3. System Arrangements:

4. Time:

5. Tide:

6. Hull Potential (high):

6a. Hull Potential (low):

7. Power Supply Output (volts):

7a. Power Supply Output (amps):

8. Ag/AgCI Reference Cell Potential: MV:

9. Ships and Floats Moored together have at least 2 Bonding Straps Each:

10. Wetted Area:

FWD Draft:

AFT Draft:

List:

Comments:

Inspector Inspector Inspection Manager

Attachment 10 NSTM 50 INSPECTION GUIDELINES - Descrepancy Listing Spec Code:

Line Item # Location Discrepancy Discovery Dt Correction Dt

Berthed At:

Quarter:

NSTM 50 INSPECTION GUIDELINES

CP2

Insp Date:

TDL

Remarks N/A

NO

YES

Description Item Take and record hull potential readings every 50 feet and record. All readings fall within the range of 0.8 to 1.2 volt range.

Current readings to each anode have been checked and are normal? Record readings.

Are support cords for anodes taking strain off cable?

Reference cell has been checked against shop standard cell and is satisfactory.

Potentiometer-voltmeter has been checked against a standard Weston cell or a battery with a known voltage and is within specifications or adjustments have been made to bring within specs.

Have all other discrepancies been reported? If not report them here.

C/P Potential

1. Annode Type Installed:

2. Number of Annodes:

3. System Arrangements:

4. Time:

5. Tide:

6. Hull Potential (high):

6a. Hull Potential (low):

7. Power Supply Output (volts):

7a. Power Supply Output (amps):

8. Ag/AgCI Reference Cell Potential: MV:

9. Ships and Floats Moored together have at least 2 Bonding Straps Each:

10. Wetted Area:

FWD Draft:

AFT Draft:

List:

Comments:

Inspector Inspector Inspection Manager Cathodic Protection Anode Results Number Cathodic Protection Hull Potential Results Output Number Output Number Output Number Output Number Hull Reading Number Number Number Hull Reading Hull Reading

Line Item # Location Discrepancy

Berthed At:

Quarter:

NSTM 50 INSPECTION GUIDELINES

CP3

Insp Date:

TDL

Remarks N/A

NO

YES

Description Item Check power supply ammeters and voltmeters against a suitable calibrated meter. Were results within specifications ?

Remove dust and debris from power supply enclosures. Is the general condition satisfactory ?

(Automatic hull potential control only) Check reference electrode on the unit against a standard cell. Is the error 0.05 volts or less compared to standard silver-silver chloride reference cell?

Clean all exposed terminal connection, ship bonds, rectifier connections, ground return connections by sandpapering. Have all listed connections been sandpapered and in good condition?

All ships in nest have CP installed.

Are there 2 bonding cables installed, one fwd and one aft between ships. (Ships over 400 foot long require a third bonding cable in the middle) Have all other discrepancies been reported? If not report them here.

C/P System Check

1. Annode Type Installed:

2. Number of Annodes:

3. System Arrangements:

4. Time:

5. Tide:

6. Hull Potential (high):

6a. Hull Potential (low):

7. Power Supply Output (volts):

7a. Power Supply Output (amps):

8. Ag/AgCI Reference Cell Potential: MV:

9. Ships and Floats Moored together have at least 2 Bonding Straps Each:

10. Wetted Area:

FWD Draft:

AFT Draft:

List:

Comments:

Inspector Inspector Inspection Manager

Line Item # Location Discrepancy

Berthed At:

Quarter:

NSTM 50 INSPECTION GUIDELINES

CP4

Insp Date:

TDL

Remarks N/A

NO

YES

Description Item (Automatic hull pontential control only) Record the date the reference electrode was installed. Does the reference electrode require replacement ? (must be replaced every 5 years) Have all other discrepancies been reported? If not report them here.

C/P Electrode (Auto Systems)

1. Annode Type Installed:

2. Number of Annodes:

3. System Arrangements:

4. Time:

5. Tide:

6. Hull Potential (high):

6a. Hull Potential (low):

7. Power Supply Output (volts):

7a. Power Supply Output (amps):

8. Ag/AgCI Reference Cell Potential: MV:

9. Ships and Floats Moored together have at least 2 Bonding Straps Each:

10. Wetted Area:

FWD Draft:

AFT Draft:

List:

Comments:

Inspector Inspector Inspection Manager Cathodic Protection Anode Results Number Cathodic Protection Hull Potential Results Output Number Output Number Output Number Output Number Hull Reading Number Number Number Hull Reading

Line Item # Location Discrepancy