ATT-1_WI-0101_INTRMDT_HULL SURVEY NO 7_Rev-1.pdf

USNS GUADALUPE

(T-AO 200)

100 – HULL STRUCTURE RFQ N40443-25-Q-0062

JUNE 2025

ITEM NO. 101, REV-1 CATEGORY “A” MSC MAINT HUB SAN DIEGO

INTERMEDIATE HULL SURVEY NO. 7 (ABS)

WI-0101, Rev-1, Page-1

1.0 ABSTRACT:

1.1 Provide the services of an ABS approved ESP Hull Gauging firm to take and record ultrasonic thickness readings on ship's hull, bulkheads, deck plating, scantlings, piping, and in other areas throughout the ship as required by the MSCREP, and ABS Surveyor.

The requirements of the ABS Intermediate Hull Survey No.7 for Single Hull Tankers in the Enhanced Survey Program shall form the basis for this item.

2.0 REFERENCES/ENCLOSURES:

2.1 NAVSEA Dwg No. 6630531 - General Arrangement Outboard Profile

2.2 NAVSEA Dwg No. 5903963 - General Arrangement Inboard Profile

2.3 NAVSEA Dwg No. 5903954 - Scantling Plan

2.4 NAVSEA Dwg. No. 5903954 - Scantling Sections

2.5 NAVSEA Dwg No. 5751075 - Shell Expansion Scantlings

2.6 NAVSEA Dwg. No. 8388193 - General Arrangement Tanks and Flats, Aft Fr. 60

2.7 NAVSEA Dwg. No. 801-5904296 - Capacity Plan

2.8 NAVSEA Dwg. No. 631-6240525, MSC “Paint Schedule” (Available onboard)

2.9 ABS Rules for Building and Classing Steel Vessels, Part 7, Rule Requirements for

Survey After Construction Part 7, Chapter 3 Section 2. Tanker ESP (requirements for

Intermediate Hull Survey No. 7)

2.10 ESP PROGRAM Intermediate Hull Survey No.#7 – USNS GUADALUPE (T-AO 200)

3.0 ITEM LOCATION/DESCRIPTION:

3.1 Location/Quantity:

3.1.1. Location: Various locations throughout the vessel (See Paragraph 7.9)

3.2 Item Description/Manufacturer's Data: None

4.0 GOVERNMENT FURNISHED EQUIPMENT/MATERIAL/SERVICES/INFO: None

WI-0101, Rev-1, Page-2

5.0 NOTES:

5.1 The contractor and all subcontractors, regardless of tier must consult the General

Technical Requirements (GTR) to determine applicability to this work item. In performance of this work item, the contractor and all subcontractors must comply with all applicable GTRs.

5.2 Cleaning of cargo and ballast tanks will be accomplished by Ship’s Force (in San

Diego).

6.0 QUALITY ASSURANCE REQUIREMENTS: Refer to Paragraph 7.0

7.0 STATEMENT OF WORK:

7.1 Contractor shall provide a certified marine chemist to gas free thirty-six (36) cargo and ballast tanks, throughout the period of performances for tank surveys and thickness gauging including overtime hours, weekends and holidays. Contractor shall provide a qualified competent person to perform air quality testing of the tanks atmospheres throughout the day as required after the initial gas free of the tanks has been certified by the certified marine chemist.

7.1.1. The contractor, not the government, is responsible for maintaining gas free certification status throughout each POP and performance location.

7.1.2. For estimating purposes assume the following quantities for the hull gauging requirements by location*:

7.1.2.1. NASNI: 25

7.1.2.2. Vigor Shipyard: 11

7.2 Provide all labor, materials and equipment to satisfy the requirements of ABS

Intermediate Hull Survey No. 7 (IHS#7) for Non-Double Hull Tankers in the Enhanced

Survey Program (ESP) and to obtain and record ultrasonic thickness readings using references 2.1 through 2.10 as guidance. This is to be worked in-conjunction with ABS close-up survey of the tanks and voids.

7.3 The thickness measurements shall be carried out by an ABS recognized ESP Hull

Gauging Firm according to the principles stated in Section 7-A-5 of reference 2.10. The qualifications of the ABS approved ESP Hull Gauging Firm shall be provided at the time of proposal submission.

WI-0101, Rev-1, Page-3

7.4 Contractor’s pricing will include the number of ultrasonic “shots” required to adequately conduct hull survey for all areas.

7.5 The contractor shall employ rope access personnel for the Ultrasonic Technician to direct probe (transducer) placement for the purpose of obtaining material thickness and/or positioning of a video feed for the attending Surveyor or the Level II Technician to assess the condition.

7.6 Rope Access:

7.6.1. Rope Access certified contractor personnel shall perform all rope access rigging, climbing and Rope Access in accordance with their procedure documents and regulatory requirements.

7.6.2. Rope access personnel shall be fitted with a GoPro camera system mounted to their approved hard hat.

7.6.3. Rope Access personnel shall be fitted with Rope Access contractor provided communications.

7.6.4. Ultrasonic Level II UT Technician shall calibrate the ultrasonic unit in accordance with the applicable procedure or Classification requirements with contractor provided transducer, coax cable, ultrasonic unit, and calibration standard.

7.6.5. Rope Access personnel shall be instructed by the Level II UT Technician and/or Class Surveyor which specific structure requires access for UTT gauging and/or visual close-up inspection and shall be briefed on the general visual inspection to be covered while live streaming to the Level II UT technician and/or Class Surveyor video monitor.

7.6.6. Rope Access personnel shall perform final equipment check including video, communications, lighting, and Rope Access rigging.

7.6.7. Rope Access personnel shall have access to the structure requested. During the traversing to the structure, the Rope Access personnel shall take direction from the Level II UT Technician and/or Class Surveyor for any suspect adjacent structure in which a closer or detailed visual inspection and possible

UT gauging is desired. The Rope Access personnel shall maneuver the GoPro video camera as directed by the Level II UT Technician and/or Class

Surveyor to provide clear visual inspection on the video monitor. The video

WI-0101, Rev-1, Page-4 monitor system shall be capable of recording or a capturing a still image of any requested suspect area if so needed.

7.6.8. When the Rope Access personnel are instructed, they shall clean (as required) the UT location, apply ultrasonic couplant to the specified location, and position the ultrasonic transducer to the specified location while the Level II

UT Technician interprets the signal on the ultrasonic unit. The Level II UT technician shall record the thickness readings and shall instruct the Rope

Access personnel how to mark the structure (if required).

7.6.9. The Rope Access personnel shall not make any evaluation of the structure unless specifically asked by the Surveyor for an opinion of condition and/or should the Rope Access personnel identify a safety concern affecting the

Rope Access process.

7.6.10. The contractor, not the government, is responsible for providing all-manner of equipment and personnel to support rope access during both POPs and locations.

7.7 Surface prep areas as required to obtain ultrasonic thickness readings.

7.8 Provide and setup lighting as needed (i.e. drop lights or flood lights) when surveying tanks.

7.9 Contractor shall take thickness measurements in all locations detailed in reference 2.9 and 2.10 and summarized as follows:

7.9.1. Three transverse sections within cargo block (at least 1 ballast tank)

7.9.2. Fore Peak and Aft Peak internals (including plating and stiffeners of tank bulkheads)

7.9.3. Structural members subject to close-up survey:

7.9.3.1. All transverse web frame rings in each ballast tank and in one (1) wing COT

7.9.3.2. One (1) transverse web frame rings in each remaining wing COT

7.9.3.3. 30% of deck & bottom transverses in all center tanks

7.9.3.4. All transverse bulkheads in each BWT and COT

WI-0101, Rev-1, Page-5

7.9.3.5. All deck plating in cargo area and on exposed decks (main deck & tier 1 superstructure)

7.9.3.6. Suspect areas: including, but not limited to, beneath all BWT and

COT low suctions

7.9.4. All plating in wind-and-water strakes (port and starboard full length).

7.9.5. All keel and bottom plating (full length).

7.9.6. Plating of sea chests. Shell plating in way of overboard discharges as considered necessary by the attending Surveyor.

7.10 Upon completion of each POP, provide electronic and three paper copies of the readings to ABS and MSCREP within 5 business days.

7.11 The contractor shall develop a composite drawing of locations of each reading in relation to the frame numbers, seams and butt welds, plating, and internal structural members.

7.12 After completion of all thickness measurements required, a typewritten report is to be prepared in ABS acceptable format in accordance with ABS Rules and Regulations and to the satisfaction of Local ABS Surveyor. Three (3) copies are to be submitted to the

MSCREP. The report shall give the location of measurements, the thickness measured as well as the original thickness, and the percentage of wastage. The measuring equipment type, calibration certification and names of the persons taking the measurements and their qualifications shall also be included in the report. This final report shall be completed and delivered within ten (10) working days of completion of all gauging’s required for Intermediate Hull Survey No. 7 (IHS#7).

7.13 Required by the ABS and MSCREP:

7.13.1. Provide daily reports (electronically or hard copy) of the ultrasonic readings taken the previous day. One (1) copy of each report shall be provided to the

MSCREP and ABS. These reports shall cross reference each ultrasonic reading to the location from which it was recorded.

7.14 The contractor shall repair all coatings disturbed during the accomplishment of this work item. The disturbed areas shall be coated with the systems specified in reference

2.8 using the paint product data sheets for surface preparation, environmental condition requirements, and dry film thickness.

WI-0101, Rev-1, Page-6

8.0 GENERAL REQUIREMENTS:

8.1 The gauging company shall be available to obtain initial gaugings required for the

Intermediate Hull Survey No. 7 (IHS#7) as per ABS requirement during each of the

Period Of Performances between the hours of 0800 and 1900.

8.2 The Ultrasonic and/or Close-Up inspection shall be performed in conjunction using

Remote Access, an alternative method to physically access the vessel structure requiring inspection. Remote access the vessel structure means the location of the structure to be inspected is such that the structure is not easily accessible and staging or rafting is required to access the structure. In lieu of staging and rafting, the contractor shall employ Rope Access personnel for the Ultrasonic Technician to direct probe

(transducer) placement for the purpose of obtaining material thickness and/or positioning of a video feed for the attending Surveyor or the Level II Technician to assess the condition.

8.3 All personnel conducting Rope Access shall be qualified and certified by Society of

Professional Rope Access Technicians (SPRAT) or International Rope Access Trade

Association (IRATA) with at least one Level 3Technician (Rope Access Supervisor) in accordance with SPRAT/IRATA Certification Requirements and shall be approved by the contractor to provide Rope Access.

8.4 All audio gauging equipment shall be acceptable for use by the American Bureau of

Shipping.

8.5 Use of a coax cable long enough (II-01-5002 8.2.2) to permit remote access placement of the transducer as directed by the Level II UT Technician so that the Level II UT

Technician remains in control of the Ultrasonic Equipment is required.

8.6 Video Equipment shall be at a minimum a GoPro Hero 4 Model with 4K30, 1080p

Video and 12MP Photo 30 fps capture ability with Bluetooth capability for monitoring.

8.7 Video Monitor used for remote viewing during inspection shall be capable of displaying

GoPro live footage and a minimum screen of 8”.

8.8 Lighting shall at a minimum be a headlamp affixed to the remote access hard hat or helmet capable of producing a minimum of 100 fc.

8.9 Communications shall be provided by the remote access contractor (Rope Access company).

WI-0101, Rev-1, Page-7

8.10 Rope Access Equipment shall be provided by the contractor and comply with all safety regulations to include, but not limited to, SPRAT, IRATA, and OSHA.

8.11 The gauging instruments shall be calibrated on site with certified blocks acceptable to the ABS Surveyor. The ABS Surveyor shall recheck the measurements as deemed necessary to ensure acceptable accuracy.

8.12 Contractor is responsible for conducting daily meetings with key parties to include, but not limited to, Ship’s Force, MSCREP, and ABS surveyors to ensure coordination of work, safety of personnel, and identify any potential conflicts.