Attachment_11_-_594-6395636.pdf

AUTHORITY:

NAVSEA SYSTEM CERTIFICATION

AUTHORITY SYSTEM CERTIFICATION

SURVEY CARD NO. 13 OF 23 AUGUST

COGNIZANT CODE:

PREPARED

DATE

CHECKED

ENGINEER

APPROVED

PORTSMOUTH NAVAL

SHIPYARD

PORTSMOUTH, NH 03804

CAGE 81316

PREPARED

John Webber /S/

DATE

9/14/04

CHECKED

Dan Will /S/

9/21/04

ENGINEER

John Webber /S/

9/14/04

BR HD

Dan Will /S/

9/21/04

APPROVED

N. S. Grammenos /S/

9/23/04

ACCEPTED FOR NAVSEA

APPROVED BY NAVSEA

REVISION (B) OF THIS DRAWING APPROVED

BY NAVSEA LETTER SER 394C/0268 DATED 18

MAY 2005

COMPUTER MAINTAINED. CHANGES WILL BE

INCORPORATED BY THE DESIGN ACTIVITY. THIS

DRAWING WAS DEVELOPED USING MS WORD 2000

SCOPE

OF

CERTIFICATION

DEPARTMENT OF THE NAVY

NAVAL SEA SYSTEMS COMMAND

WASHINGTON DC 20362

Atmospheric Diving System (ADS)

Launch and Recovery System (LARS) Vessel of Opportunity (VOO)

Mounting Procedure

A D S L A R S M O U N T P R O C E D U R E

SIZE CAGE NO. WT GRP NAVSEA DRAWING NO REV

A 81316 594 6395636 E

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DISTRIBUTION STATEMENT A: APPROVED FOR PUBLIC RELEASE;

DISTRIBUTION IS UNLIMITED

SIZE CAGE NO. REVNAVSEA DRAWING NO.WT GRP

A 53711

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845 6395635 E

Revisions

SHEET REV DESCRIPTION BY DATE APPROVED

- Release Not approved

7-14, 21-23 A Incorporated NAVSEA comments provided by NAVSEA ltr 4855 ser 395/1145 of 2 Dec 04 JJW 1/4/05

/S/ Dan Will 2/1/05

/S/ N. S. Grammenos 2/2/05

Not Approved by NAVSEA

1-30 B Incorporated NAVSEA comments, added non-LARS diving information JJW 5/16/05

/S/ Dan Will 5/19/05

/S/ N. S. Grammenos 5/19/05

/S/ J. M. Higgins 5/19/05

NAVSEA LETTER

SER 394C/0268

DATED 18 MAY 2005

5,19-20 C Revised the non-LARS diving trolley welded attachment to use rectangular tubes instead of footer plates. JJW 7/1/09 Not Approved

D

Sh 3. Replaced ref (10), added ref (12) Sh 4. Deleted Appendices E, F.

Sh 5 1.0 Added OP citation to scope, added allowance to reuse installations to sac. tabs and rect. tubes Sh 6. Added ref (12) citation, optional hose length (sch.

205.2-196-10) 5.0, 6.0, 7.0 Rm specific torque wrench, made laser leveling optional, update bolt spec (sch 205.2-216-09), added square washers ( sch. 205.2-260-11), corr.

fastener qty’s, added reuse of installations Sh 11. Corrected Fig 2 weld symbol (sch 205.2-42-11) Sh 12. Added trimming of tabs, shimming LARS (sch.

205.2-460-10)

9.0 Rm specific torque wrenches, update bolt spec (sch

205.2-216-09)

9.2.8 Changed torque to 36 ft-lbs.

10.0 Updated procedure to ref (11) Rev A cfg., rm

specific torque wrench, added use of ref (10), added reuse of installations App. H. Added trolley welded installation record

JJW 12 Sep 11

/S/ N.S. Grammenos 9/27/11

NAVSEA LETTER

SER 394R/0870

DATED 21 Dec 11

6, 10, 12, 19 E

Sh 6. Added deck loading information for ADS support equipment (sch. 205.2-521-12) Sh 10, 12 and 19. Added equivalent weld filler material (sch. 205.2-521-12)

PEG

DW

11 Sep 12 18 Sep 12

/S/ N.S. Grammenos 18 Sep 12

Applicability:

This drawing is applicable to:

ADS 2000 Launch and Recovery Systems Units 001, 002, 003

Applicability of this drawing to other assets must be determined by PNS (Code 205) & NAVSEA PMS394R.

A 81316

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E 594 6395636

SHEET LAST DIGIT NUMBER

0 1 2 3 4 5 6 7 8 9

0 D D D D D D D D D 1 D D D D D D D D D D 2 D D D D D D D D D

REVISION STATUS

OF SHEETS

NAVSEA 391R 1

URC (CO, QAO) 1

NAVSEA 395A3 1

NAVSEA 394C 1

NAVSEA 394R 1 1

CSDS-5

DSU - QA DEPT 1

DSU 1

205 (ADS Project) 1 1 1 1 1

ISSUE

DATE

REVISION - A B C D E

PRINTS ISSUED

12 AUWS and Submarine Rescue Chamber VOO Deck Layout 594-7329708

11 Trolley Welded Tube Mounts 594-7329713

10 Remove/Install Procedure 16 – Remove/Install LARS Trolley Assembly SS520-AU-SCB-010/ADS, APPENDIX D, RIP16

9 ADS LARS Trolley Footer Plates 594-7329590

8 System Certification Procedures and Criteria Manual for Deep Submergence Systems SS800-AG-MAN-010/P-9290

7 NAVSEA ltr 4855 ser 395/1037 of 1 Nov 04 N/A

6 Sacrificial Weld Down Plates, Dynacon Inc. 468-1005-20 Rev. -

5 Nondestructive Testing Acceptance Criteria MIL-STD-2035A

4 Structural Welding Code – Steel, American Welding Society (AWS) D1.1

3 LARS Skid Erection Set Up Pre-Mission SS520-AU-SCB-010/ADS, APPENDIX H, OP2

2 LARS Hydraulic / Electric Interface Set Up Pre-Mission SS520-AU-SCB-010/ADS, APPENDIX H, OP1

1 ISKID General Assembly, Dynacon, Inc. 5006-6101-01

NO. TITLE IDENT

REFERENCES

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TABLE OF CONTENTS

1. Purpose and Scope

2. Attachment Methods

3. Constraints

3.1 VOO Qualification

3.2 Detailed Constraints

4. LARS Mounting Method Selection

5. Intermediate Skid Baxter Bolt Installation

6. Intermediate Skid Welded Installation

7. Sacrificial Tab Installation

8. Post-Installation Load Test

9. Non-LARS Diving, Trolley Bolted Attachment

10. Non-LARS Diving, Trolley Welded Attachment

Appendices:

A. VOO Baxter bolt strength and position requirements

B. Intermediate skid general arrangement

C. Intermediate skid allowable obstructions

D. Sacrificial tab

E. Deleted

F. Deleted

G. Trolley footer plate positioning

H. LARS installation record

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1.0 Purpose and Scope

The Atmospheric Diving System (ADS) 2000 is designed for rapid deployment and installation on available Vessels of Opportunity (VOO). The system can be used to its maximum depth when launched from the Launch and Recovery System (LARS), or to shallower depths when launched with the VOO crane (hand-tended diving).

This procedure details the installation of the LARS and the use of the LARS trolley as a manned support stand during hand tended diving. An overview of the attachment methods is provided, as well as vessel evaluation criteria, installation and load testing procedures, and a form for documenting the installation. This procedure is invoked by reference (2) and when necessary to prepare for hand-tended diving.

VOO installation records, Appendix H, and supporting documentation shall be maintained for the life of the ADS program.

2.0 Attachment Methods

Two attachment methods are available to secure the LARS to a VOO deck. The first uses an intermediate skid (ISKID), a structure placed between the LARS skid and the VOO deck.

The ISKID is attached to the LARS skid with 26 bolts mounted horizontally into the LARS skid mounting points. The LARS skid/ISKID assembly is secured to the VOO deck using Baxter bolts. The ISKID raises the LARS skid approximately 12 inches, allowing the LARS to be used where low obstructions exist along the VOO gunwale. If required, the ISKID can be welded to the VOO deck if no Baxter bolts are available and the gunwale is obstructed. This method may permanently damage the intermediate skid and should only be used if necessary.

Appendix B provides the general layout of the ISKID structure.

The second LARS attachment method uses sacrificial tabs. These rectangular steel plates are bolted to the 26 mounting holes on the LARS skid and welded to the VOO deck. The tabs are discarded at the end of the dive sequence, or may be left on deck for future installations.

Appendix D provides the drawing of the sacrificial tabs.

In hand tended diving, where the LARS is not used, the trolley can be removed from the LARS and used as a support stand for the manned ADS suit prior to lifting overboard. Footer plates are used to secure the trolley to the VOO deck using Baxter bolts. If no Baxter bolts are available, rectangular tubes can be attached to the trolley wheel mount and then welded to the VOO deck. The tubes are discarded at the end of the dive sequence, or may be left on deck for future installations.

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3.0 Constraints

3.1 VOO Qualification

The baseline VOO for the ADS system is the U.S. Navy T-ATF fleet ocean tug.

The VOO must be structurally capable of supporting LARS operations. Certification by a recognized authority for operation in the region of use may be considered a minimum standard for acceptability.

Ensure compatibility of the weld rod to the ship’s steel deck prior to commencing work on the VOO.

3.2 Detailed Constraints

Structural and deck space requirements for the LARS and associated equipment are specified as follows. Reference (12 ) provides additional equipment placement and space requirement information.

3.2.1 Minimum allowable deck pressure

Intermediate skid installation: 416 lb/ft2

Sacrificial tab installation: 955 lb/ft2

Hand Tended Installation: 100 lb/ft2

PDU: 900 lb/ft2 (203 lb/ft2 when using two 12” x 12” x 5’ (min) blocks of dunnage)

HPU: 750 lb/ft2 (490 lb/ft2 when using two 12” x 12” x 5’ (min) blocks of dunnage)

3.2.2 Minimum Baxter bolt pullout strength: 10,000 lb.

3.2.3 Vessel structure

Deck and deck attachment points must not have:

Damage or cracking

Cracked welds

Pitting or other corrosion greater than 25% of the original material thickness

3.2.3 Deck area (See Appendices E and F)

Minimum deck square footage (Entire ADS Installation): 1,900 sq. ft.

Minimum dimensions: 38 ft. x 50 ft.

(These dimensions are for the installation of 2 LARS skids, 1 control van, 1 hydraulic power unit (HPU), 1 power distribution unit (PDU), and 2 generators).

3.2.4 Component placement restrictions

HPU – LARS skid separation: 20 ft. maximum (for 25 ft. hoses)

45 ft. maximum (for 50 ft hoses)

Maximum separation between any two ADS deck mounted components: 70 ft.

Consideration should be given to maximize the distance between the overboarding position of the ADS suit and the vessel’s propellers and thrusters.

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4.0 LARS Mounting Method Selection

LARS required for ADS diving

Inspect VOO See Section 3.0

Is VOO satisfactory?

Select alternate VOO No

Does VOO have Baxter bolts?

Yes

Mount LARS skid with sacrificial tabs (See Section 7)

Do Baxter bolts meet strength and position requirements for I-skid use?

See Appendix (a)

Yes

Mount LARS skid to Baxter bolts with I-skids (See Section 5)

No

No

Yes

Do Baxter bolts meet strength and position requirements for I-skid use?

See Appendix (a)

Are there any obstructions between deck and gunwale?

Is the obstruction removable or within the constraints defined in

Appendix (c)?

Yes

No

Does VOO have Baxter bolts?

Mount LARS skid on I-skids, weld

I-skid to deck (See Section 6)

(See Note 1 below)

Remove obstruction

No

Not Removable

Removable

No

No

Yes

Yes

Yes

Notes:

1. This method may cause permanent damage to the intermediate skids and should only be used if necessary.

Is it safe to weld in chosen location?

Yes

Select alternate VOO

No

Is it safe to weld in chosen location?

Yes

Select alternate VOO

No

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5.0 Intermediate Skid Baxter Bolt Installation

5.1 Required equipment

LARS skid

Intermediate skid assembly

Torque wrench

Laser level (optional)

58 ea., 1”-8x2 zinc coated hex head bolt, (per LARS skid) (See notes 5.3.1 and 5.3.6)

58 ea., 1” spring lock washer (per LARS skid) (See note 5.3.1)

58 ea., washer (per LARS skid) (See note 5.3.1)

Antiseize paste

5.2 Mounting procedure

5.2.1. Inspect VOO and complete LARS Installation Record (Appendix H) Section 1.

5.2.2. Place intermediate skid components in desired location on VOO deck, spaced as shown in Appendix B. See note 5.3.7.

5.2.3. Assemble intermediate skid as shown in Appendix B. Lubricate all fasteners with antiseize paste and torque to 280 ft.-lbs. Record torque wrench data on LARS Installation record.

5.2.4. If necessary, verify all intermediate skid components are level and the top surfaces are in the same plane with laser level. Shim as required.

5.2.5. Secure the intermediate skid to the deck with forty (40) 1”-8x2 hex head bolts, lock washers and flat washers, lubricated with antiseize paste. Leave all deck screws loose.

5.2.6. Place LARS skid on the intermediate skid assembly.

5.2.7. Secure the LARS skid to the intermediate skid with eighteen (18) 1”-8x2 hex head bolts, lock washers and flat washers (or flat plate washers), lubricated with antiseize and torqued to 280 ft.-lbs.

5.2.8. Tighten and torque all deck bolts to 280 ft.-lbs.

5.2.9. Complete reference (2).

5.2.10. Complete reference (3).

5.2.11. Following completion of placement and assembly IAW references (2) and (3), load test the installed LARS as described in Section 8.

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5.3 Notes:

5.3.1. In accordance with reference (1), bolts shall meet the requirements of ASTM A325, ASTM A449, or SAE J429 (Grade 5). Per reference (7), all 1”-8 fasteners are MCD B and all washers are MCD C. Adequate OQE must be maintained IAW reference (8). Refer to reference (1) for bolt and washer specifications.

5.3.2. The four (4) outboard deck bolts are not necessary and may be omitted if no Baxter bolts exist on the vessel deck in this position. See Figure 1.

5.3.3. In addition to the four (4) bolts omitted in Note 5.3.2, no more than one (1) deck bolt may be omitted from each of the four individual intermediate skid weldments.

See Figure 1.

5.3.4. None of the nine (9) horizontal tiedown bolts connecting the intermediate skid to the LARS skid can be omitted from either side of the assembly.

5.3.5. No elastomeric materials (rubber) are to be placed between the intermediate skids and the VOO deck.

5.3.6. One (1) inch minimum thread engagement in deck inserts is required. Two (2) inch long bolts are the minimum length required. Longer bolts may be needed as a result of deck irregularities or shimming performed during installation.

5.3.7. Intermediate skid installations remaining from a previous mobilization may be used. All fasteners are to be re-torqued and documented on the LARS Installation Record (Appendix H). Load testing as directed in step 5.2.11 shall be repeated prior to manned operation.

Figure 1. ISKID Deck Bolt Requirements

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6.0 Intermediate Skid Welded Installation

NOTE: This attachment method is to be used only if necessary. Welding may permanently damage the intermediate skid assembly.

WARNING: Ensure no welding is performed on deck plate that forms any part of a vessel fuel tank without taking proper precautions.

6.1 Required equipment:

Intermediate skid assembly

Torque wrench

Laser level (optional)

18 ea., 1”-8x2 zinc coated hex head bolt (per LARS skid)(See note 6.3.1)

18 ea., 1” spring lock washer (per LARS skid) (See note 6.3.1)

18 ea., 1” washer (per LARS skid) (See note 6.3.1)

6.2 Mounting procedure

6.2.1 Inspect VOO and complete LARS Installation Record (Appendix H) Section 1.

6.2.2 Place intermediate skid components in desired location on VOO deck, spaced as shown in Appendix B. See note 6.3.4.

6.2.3 Assemble intermediate skid as shown in Appendix B. Lubricate all fasteners with antiseize paste and torque to 280 ft.-lbs. Record torque wrench data on LARS Installation record.

6.2.4 If necessary, verify all intermediate skid components are level and the top surfaces are in the same plane with laser level. Shim as required with steel plate.

6.2.5 Weld each of the four intermediate skid weldments to the VOO deck, using intermittent 3/8” fillet welds all around. Welding is to be in accordance with reference (4), using E71-T or E7018 filler. See Figure 2.

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Figure 2. ISKID Welded Installation

6.2.6 Place LARS skid on intermediate skid assembly.

6.2.7 Secure the LARS skid to the intermediate skid with eighteen (18) 1”-8x2 hex head bolts, lock washers and flat washers (or flat plate washers), lubricated with antiseize paste and torqued to 280 ft.-lbs.

6.2.8 Complete reference (2).

6.2.9 Complete reference (3).

6.2.10 Following completion of placement and assembly IAW references (2) and (3), load test the installed LARS as described in Section 8.

6.2.11 Visually inspect welds in accordance with reference (5), Section 4. Document inspector qualifications and inspection results in LARS Installation Record (Appendix H).

6.3 Notes:

6.3.1 In accordance with reference (1), bolts shall meet the requirements of ASTM A325, ASTM A449, or SAE J429 (Grade 5). Per reference (7), all 1”-8 fasteners are MCD B and all washers are MCD C. Adequate OQE must be maintained IAW reference (8). Refer to reference (1) for bolt and washer specifications.

6.3.2 None of the nine (9) horizontal tiedown bolts connecting the intermediate skid to the LARS skid can be omitted from either side of the assembly.

6.3.3 No elastomeric materials (rubber) are to be placed between the intermediate skids and the VOO deck.

6.3.4 Intermediate skid installations remaining from a previous mobilization may be used. All fasteners are to be re-torqued, and documented on the LARS Installation Record (Appendix H). Load testing as directed in step 6.2.10 shall be repeated prior to manned operation, and all welds are to be re-inspected and documented on the LARS Installation Record as directed in step 6.2.11.

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7.0 Sacrificial Tab Installation

7.1 Required equipment:

26 ea. Sacrificial tab (reference (6))

Torque wrench

26 ea., 1”-8x2 zinc coated hex head bolt, (per LARS skid)(See note 7.3.1)

26 ea., 1” spring lock washer (per LARS skid)( See note 7.3.1)

26 ea., 1” flat washer (per LARS skid)( See note 7.3.1)

7.2 Mounting procedure

7.2.1. Inspect VOO and complete LARS Installation Record (Appendix H)

Section 1.

7.2.2. Place LARS skid on VOO deck in the desired position. The outboard edge of the LARS skid may be no more than 13 inches from the VOO gunwale. See note 7.3.3.

7.2.3. Secure the LARS skid with temporary attachments as needed to ensure it will not move during installation.

7.2.4. Attach sacrificial tabs to the LARS skid with 1”-8x2 hex head bolts, lock washers and flat washers, lubricated with antiseize paste, wrench tight. Trim tabs as required to accommodate deck irregularity and fill gaps between the LARS and deck with shims to support the LARS.

7.2.5. Complete reference (2).

7.2.6. Complete reference (3). If, as a result of deck irregularity, the system is too distorted to allow the A-frame or winch frames to be completely assembled and secured, shim as needed between the LARS skid and deck with steel plate.

7.2.7. Weld each sacrificial tab along the outboard face, as shown in Figure 3, with a 5/8 bevel weld reinforced with a 3/8” fillet weld. Welding is to be in accordance with reference (4), using E71-T or E7018 filler.

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7.2.8. Torque all horizontal tiedown bolts (26 total) to 280 ft.-lbs. Record torque wrench data on LARS Installation record.

7.2.9. Following completion of placement and assembly IAW references (2) and (3), load test the installed LARS as described in Section 8.

7.2.10. Visually inspect welds in accordance with reference (5), Section 4.

1. LARS Skid

2. Sacrificial tab

3. 1”-8 x2 hex head bolt, spring lock washer and flat washer

4. VOO deck

Figure 3. Sacrificial tab installation

7.3 Notes:

7.3.1. In accordance with reference (1), bolts shall meet the requirements of ASTM A325, ASTM A449, or SAE J429 (Grade 5). Per reference (7), all 1”-8 fasteners are MCD B and all washers are MCD C. Adequate OQE must be maintained IAW reference (8). Refer to reference (1) for bolt and washer specifications.

7.3.2. None of the nine (9) horizontal tiedown bolts connecting the LARS skid to the sacrificial tabs can be omitted from either side of the assembly.

7.3.3. Sacrificial tab installations remaining from a previous mobilization may be used. All fasteners are to be re-torqued, and documented on the LARS Installation Record (Appendix H). Load testing as directed in step 7.2.9 shall be repeated prior to manned operation, and all welds are to be re-inspected and documented on the LARS Installation Record as directed in step 7.2.10.

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8.0 Post-Installation Load Test

Following installation of the ADS LARS, a static load test is to be performed to verify the installation is adequate for manned use. The weight applied is to be twice the maximum operational load, as described in Note 8.5.1.

8.1 Required Equipment

8.1.1 2 ea. water weight bag, 5 ton capacity

8.1.2 Calibrated load indicator shackle, 12 ton min. capacity

8.1.3 4 ea. nylon rope, ½” diameter minimum x 30 ft. long

8.2 Test Parameters

8.2.1. Test duration: Minimum of 10 minutes

8.2.2. Test load: 13,050 lb., –0%, +5%

8.3 Acceptance criteria:

8.3.1 No permanent deformation, cracking or damage to any part of the structure, machinery, or strength welds. Visually inspect sacrificial tab or intermediate skid deck attachment welds in accordance with reference (5), Section 4.

8.3.2 No loosening of any installed fasteners.

8.3.3 No binding, abnormal noise or vibration following load test is acceptable.

8.3.4 Hydraulic leaks and distortion, misalignment, or corrosion of structural members are unacceptable.

8.4 Procedure

8.4.1 Reeve the secondary recovery wire rope through the secondary sheave. Do not connect the secondary recovery wire rope to the Tether Management System

(TMS).

NOTE: While luffing the A-frame, ensure sufficient slack exists in the umbilical to prevent damage by kinking, abrasion, or stretching.

8.4.2. Luff the A-frame inboard and place the TMS on the LARS skid deck.

8.4.3. Release the docking head latches, disconnecting the TMS from the docking head and the A-frame.

8.4.4. Luff the A-frame in the overboard direction to allow access directly below the docking head from the LARS deck.

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DANGER: Any intermediate rigging necessary to connect the load indicating device and water weight bags to the secondary recovery wire rope must have a safe working load exceeding 18,000 lbs.

NOTE: Refer to Figure 4 for rigging reference.

8.4.5. In accordance with manufacturer’s instructions, attach the load indicator shackle to the secondary recovery wire rope.

8.4.6. In accordance with manufacturer’s instructions, attach water weight bags to the load indicator shackle.

8.4.7. Attach two tag lines to each of the water weight bags.

8.4.8. Luff the A-frame fully overboard.

8.4.9. On the LARS, open ball valve BV-4 and verify 0 psi on gauge PG-5. This applies the secondary recovery winch caliper brake.

8.4.10. Turn off the HPU, removing hydraulic power to the LARS skid.

8.4.11. Evenly fill each of the water weight bags. Fill the water weight bag until the load cell indicates the test load has been reached. A total of approximately 1,500 gallons of water is required. Record the time when the test load has been reached on Section 3 of Appendix H, LARS Installation Record.

8.4.12. Record the actual load applied as indicated by the load indicating shackle on Section 3 of Appendix H, LARS Installation Record.

8.4.13. Hold the test load for a minimum of 10 minutes. Record the end time for the test on Section 3 of Appendix H, LARS Installation Record.

8.4.14. Remove the test load by emptying the water bags.

8.4.15. Remove the water bags.

8.4.16. Inspect the installation of the LARS on the VOO deck in accordance with the acceptance criteria of Section 8.3.1 and 8.3.2. Document weld inspector qualifications and inspection results in LARS Installation Record (Appendix H).

8.4.17. Luff the A-frame completely overboard and return completely inboard. Observe operation in accordance with the acceptance criteria of Section 8.3.3. Record results on the LARS Installation Record.

8.4.18. Perform general inspection of LARS skid to the acceptance criteria of Section

8.3.4. Record inspection results on the LARS Installation Record.

8.4.19. Correct any deficiencies and re-perform the post-installation load test until the installation is satisfactory by the criteria of Section 8.3.

8.4.20. Complete Post-installation load test certification (Appendix H) and file with completed OP1 and OP2 (references (2) and (3)).

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Figure 4. Post-installation load test

8.5 Notes

8.5.1 The applied load is calculated as follows: 2x( 5lb. suit in-water weight + 2200 ft. of umbilical @1.1 lb/ft + 4100 lb TMS weight)= 13,050 lb.

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9.0 Non-LARS Diving, Trolley Bolted Attachment

This procedure is used to secure the LARS trolley to the VOO deck using the trolley footer plates (reference (9)) and the VOO Baxter bolts.

9.1 Required equipment

LARS trolley (removed from LARS skid)

Trolley footer plates

Torque wrench

16 ea., 1”-8x2 zinc coated hex head bolt, (See note 9.3.2)

16 ea., 1” spring lock washer (See note 9.3.2)

16 ea., 1” flat washer (See note 9.3.2)

9.2 Mounting procedure

9.2.1. Inspect VOO and complete LARS Installation Record (Appendix H) Section 1.

No deck pressure rating is required, provided the deck meets the inspection criteria of Section 3.

9.2.2. Place trolley footer plates in desired position on deck, oriented as indicated on plates and spaced as shown in Appendix G.

9.2.3. Secure the footer plates to the deck with sixteen (16) 1”-8x2 hex head bolts, lock washers and flat washers, lubricated with antiseize paste. Leave all deck screws loose.

9.2.4. Remove trolley from the LARS in IAW reference (10).

9.2.5. Remove the ½”-13 bolt from each of the four footer plates.

9.2.6. Place the trolley (oriented in the direction indicated on the footer plates with the back of the ADS suit facing the direction labeled “Forward”) on the footer plates with the wheel mounts between the vertical tabs of the footer plates.

9.2.7. Place one (1) ½” flat washer on each bolt. Reinsert the four (4) ½”-13 bolts in the footer plates, passing the bolt through the trolley wheel axle hole in the trolley wheel mount. Place the remaining ½” flat washers and the ½”-13 nylock nuts on the ½”-13 bolts.

9.2.8. Torque the four (4) ½”-13 bolts to 36 ft-lbs.

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9.2.9. Torque the sixteen (16)1”-8 deck bolts to 280 ft-lbs.

9.2.10. Place additional system components as required.

9.3 Notes:

9.3.1 A load test is not required for this installation.

9.3.2 In accordance with reference (1), bolts shall meet the requirements of ASTM A325, ASTM A449, or SAE J429 (Grade 5). Per reference (7), all 1”-8 fasteners are MCD B and all washers are MCD C. Adequate OQE must be maintained IAW reference (8).

9.3.3 None of the four (4) ½”-13 bolts connecting the trolley to the footer plates can be omitted.

9.3.4 No more than one (1) 1”-8 deck bolt can be omitted from each of the four (4) footer plates.

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10.0 Non-LARS Diving, Trolley Welded Attachment

This procedure is used to secure the LARS trolley using the rectangular tubes (reference (11)), which will be welded to the VOO deck.

10.1 Required equipment

LARS trolley (removed from LARS skid)

List of material items from NAVSEA dwg 594-7329713, ADS 2000 Launch & Recovery System Trolley Welded Tube Mounts (Reference (11))

Torque wrench

10.2 Mounting procedure

10.2.1. Inspect VOO and complete LARS Installation Record (Appendix H) Section 1.

No deck pressure rating is required, provided the deck meets the inspection criteria of Section 3.

10.2.2. Remove the trolley from the LARS in accordance with reference (10).

10.2.3. Remove the ½-13 x 4 ½” long bolt from each of the four rectangular tubes.

10.2.4. Center a rectangular tube inside a trolley wheel mount such that the hole in the rectangular tube aligns with the wheel mount holes.

10.2.5. Assemble the ½-13 x 4½ bolt, flat washers, square washers, and nylock nut as shown in reference (11), ensuring one flat washer is placed on each side of the rectangular tube.

10.2.6. Repeat for the remaining three wheel mounts.

10.2.7. Torque the four (4) ½”-13 bolts to 36 ft-lbs.

10.2.8. Place the trolley over the ship’s frame as best as possible. Shim as required with steel plate to level the trolley.

10.2.9. Weld each of the four rectangular tubes to the VOO deck as shown in Figure 5.

Welding is to be IAW reference (4), using E71-T or E7018 filler. Magnetic particle inspection of the weld IAW reference (4) is required. Document inspector qualifications and inspection results in LARS Installation Record (Appendix H), Section 4.

10.2.10. Place additional system components as required.

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Figure 5. Rectangular Tube Welded Installation

10.3 Notes:

10.3.1 A load test is not required for this installation.

10.3.2 None of the four (4) ½”-13 bolts connecting the trolley to the rectangular tubes can be omitted.

10.3.3 Rectangular tube installations remaining from a previous mobilization may be used. All fasteners are to be re-torqued, and documented on the LARS Installation Record (Appendix H). All welds are to be re-inspected and documented on the LARS Installation Record as directed in step 10.2.9.

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APPENDICES

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Appendix A. VOO Baxter bolt strength and position requirements

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Appendix B. Intermediate skid general arrangement (for reference only)

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Appendix C. Intermediate skid allowable obstructions

A ll

D im en si on s ar e in In ch es

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Appendix D. Sacrificial tab (for reference only)

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Appendix G. Trolley footer plate positioning

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Appendix H. LARS Installation Record

Vessel:

Installation Date:

LARS Unit(s) installed:

1. VOO Qualification

Vessel Certifications:

Maximum rated deck pressure: lb/sq. ft. (416 lb/ft2 min. required for LARS intermediate skid installations, 955 lb/ft2 min. required for LARS sacrificial tab installations)

Baxter bolt load rating: lb. (10,000 lb. min. required)

VOO meets structural and space requirements of Section 3.

Signed: Date:

Comments:

2. Installation

Torque wrench serial number: Torque wrench range:

Torque wrench calibration date:

Torque wrench next calibration due:

Date torque wrench used:

All fasteners torqued as required.

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3. Post-Installation Load Test (LARS Installations Only)

Load cell calibration date:

Load cell next calibration due:

Date load cell used:

Time test load reached:

Test load applied: lb.

Time test load removed:

Water bag load test completed and installation is acceptable by the requirements of Sections 8.3.1 and 8.3.2.

Welder’s qualifications, welding equipment, and welding procedures verified: _____

Weld inspector qualifications and expiration:

LARS operation test completed and is acceptable by the requirements of Section 8.3.3.

General inspection results acceptable by the requirements of Section 8.3.4.

4. Post-Installation Weld Inspection (Trolley Welded Installations Only)

Installation is acceptable by the requirements of Section 10.2.9.

Signed: Date:

Welder’s qualifications, welding equipment, and welding procedures verified: _____

Weld inspector qualifications and expiration:

Retain this completed form with the completed OPs (references (2) and (3)) for the dive sequence.