NAVSEA 0902-018-2010 General Overhaul Specifications Deep Diving SSBN and SSN Submarines.pdf

Distribution Statement D: Distribution limited to DoD and DoD Contractors only;

Critical Technology. (01 August 2018)

Other Requests shall be referred to Naval Sea Systems Command, NAVSEA 05U7C.

NAVSEA 0902-018-2010

GENERAL OVERHAUL

SPECIFICATIONS

FOR DEEP DIVING SSBN/SSN

SUBMARINES

REVISION B

1 August 2018

(Change 5 15 January 2020)

NAVAL SEA SYSTEMS COMMAND

DEPARTMENT OF THE NAVY

WASHINGTON, DC 20376-0001

FOR OFFICIAL USE ONLY

REVISIONS/CHANGES

CHANGE 5 i

REV DESCRIPTION DATE

B

UACS SUBMEP 14-187R Section 9390-3-e UACS SUBMEP 15-145R Section 9460-1, 9480-2, 9480-10, 9560-1 UACS NAVSEA 16-002R Section 9120-5-b UACS SUBMEP 16-366R Section 9590-1 UACS PSNS 16-135R Section 9670-2.a UACS NNEWS 14-001R Section 9090-3 UACS NNS 16-007R Section 9110-0-c UACS PSNS 16-018AR Section 9020-1-f UACS SUBMEP 17-288R Section 9730-1-h UACS MTSSY 17-001R Section 9480-0-i UACS NAVSEA 17-001R Section 9430-1 UACS PNS 18-001R Section 9110-0-b UACS NSWCCD 18-001R Section 9090-3 UACS EBCORP 18-008R Section 9020-1-i UACS SUBMEP 18-147R Section 9390-3 UACS PHNS 18-011R Section 9450-1 TPR 765-IDD01-H002R Section 9480-1-d

01 AUG 2018

CHANGE 1 UACS NAVSEA-18-002 Rev B Change 1 UACS SUBMEP-18-203R Section 9200

01 OCT 2018

CHANGE 2 UACS NAVSEA-19-002 Rev B Change 2 UACS PHNS 18-011R Section 9450-1

01 FEB 2019

CHANGE 3 UACS NAVSEA-19-003 Rev B Change 3 UACS NAVSEA 18-002R Section 9620-1.a UACS PNS-19-034R Section 9110.0.b UACS PNS-19-037R Section 9380-1.n

18 JUL 2019

REVISIONS/CHANGES

CHANGE 5 ii

CHANGE 4 UACS NAVSEA-19-005 Rev B Change 4 UACS SUBMEP-18-289R Section 9120-1-a UACS SUBMEP-19-105R Section 9450-1-d

15 OCT 2019

CHANGE 5 UACS NAVSEA-20-001 Rev B Change 5 UACS ICI-19-022R Section 9590-2 UACS SUBMEP-18-147R Section 9390-3

15 JAN 2020

GENERAL OVERHAUL SPECIFICATIONS

FOR DEEP DIVING SSBN/SSN SUBMARINES

LIST OF CURRENT REV/CHG AND EFFECTIVE PAGES

REVISON B

CHANGE 5

Section Page ACN No. Page Date

Title Page N/A Change 5 15 Jan 20

Description of Changes i Change 5 15 Jan 20 ii Change 5 15 Jan 20

List of Current Rev/Chg and Effective Pages

1 Change 5 15 Jan 20 2 Change 5 15 Jan 20 3 Change 5 15 Jan 20 4 Change 5 15 Jan 20 5 Change 5 15 Jan 20

Contents i Revision B 01 Aug 18 ii Revision B 01 Aug 18 iii Revision B 01 Aug 18

5000-0 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18 3 Revision B 01 Aug 18 4 Revision B 01 Aug 18

9020-0 1 Revision B 01 Aug 18

3 Revision B 01 Aug 18 4 Revision B 01 Aug 18 5 Revision B 01 Aug 18 6 Revision B 01 Aug 18

9020-1 1 Revision B 01 Aug 18

3 Revision B 01 Aug 18 4 Revision B 01 Aug 18 5 Revision B 01 Aug 18

7 Revision B 01 Aug 18

9020-2 1 Revision B 01 Aug 18

9020-3 1 Revision B 01 Aug 18

9020-5 1 Revision B 01 Aug 18

9020-6 1 Revision B 01 Aug 18 2 Revision B 01 Aug 18

9020-9 1 Revision B 01 Aug 18

Section Page ACN No. Page Date

9080-1 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18

9090-1 1 Revision B 01 Aug 18

9090-3 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18 3 Revision B 01 Aug 18

4 Revision B 01 Aug 18

9090-4 1 Revision B 01 Aug 18

9100-1 1 Revision B 01 Aug 18

9110-0 1 Revision B 01 Aug 18

2 Change 3 18 Jul 19 3 Revision B 01 Aug 18 4 Revision B 01 Aug 18 5 Revision B 01 Aug 18 6 Revision B 01 Aug 18 7 Revision B 01 Aug 18 8 Revision B 01 Aug 18 9 Revision B 01 Aug 18

9110-1 1 Revision B 01 Aug 18

9110-3 1 Revision B 01 Aug 18

9110-5 1 Revision B 01 Aug 18

9110-6 1 Revision B 01 Aug 18

9110-9 1 Revision B 01 Aug 18 2 Revision B 01 Aug 18

9110-12 1 Revision B 01 Aug 18

9110-16 1 Revision B 01 Aug 18

9110-17 1 Revision B 01 Aug 18

9120-1 1 Change 4 15 Oct 19

9120-4 1 Revision B 01 Aug 18

9120-5 1 Revision B 01 Aug 18 2 Revision B 01 Aug 18

9140-1 1 Revision B 01 Aug 18 2 Change 2 17 Jan 19 3 Change 2 17 Jan 19

9160-1 1 Revision B 01 Aug 18

9160-2 1 Revision B 01 Aug 18

9160-4 1 Revision B 01 Aug 18

9160-5 1 Revision B 01 Aug 18

9170-2 1 Revision B 01 Aug 18

9180-2 1 Revision B 01 Aug 18

9190-1 1 Revision B 01 Aug 18

9190-3 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18

9190-6 1 Revision B 01 Aug 18

9200-1 1 Change 1 01 Oct 18

2 Change 1 01 Oct 18

9210-1 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18 3 Revision B 01 Aug 18

4 Revision B 01 Aug 18

9220-1 1 Revision B 01 Aug 18

9220-3 1 Revision B 01 Aug 18

9220-4 (New) 1 Revision B 01 Aug 18

9230-1 1 Revision B 01 Aug 18 2 Revision B 01 Aug 18

9240-1 1 Revision B 01 Aug 18

9260-1 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18

9280-1 1 Revision B 01 Aug 18

9280-2 1 Revision B 01 Aug 18

9280-3 1 Revision B 01 Aug 18

9280-6 1 Revision B 01 Aug 18

9290-1 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18 3 Revision B 01 Aug 18 4 Revision B 01 Aug 18 5 Revision B 01 Aug 18 6 Revision B 01 Aug 18 7 Revision B 01 Aug 18

9 Revision B 01 Aug 18

9290-3 1 Revision B 01 Aug 18

9290-8 1 Revision B 01 Aug 18

9290-12 1 Revision B 01 Aug 18

9300-1 1 Revision B 01 Aug 18

9300-3 1 Revision B 01 Aug 18

9310-1 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18 3 Revision B 01 Aug 18

9330-0 1 Revision B 01 Aug 18

9340-1 1 Revision B 01 Aug 18

Section Page ACN No. Page Date

9350-1 1 Revision B 01 Aug 18

9360-1 1 Revision B 01 Aug 18

9360-4 1 Revision B 01 Aug 18

9370-1 1 Revision B 01 Aug 18

9380-1 1 Revision B 01 Aug 18 2 Revision B 01 Aug 18

3 Revision B 01 Aug 18 4 Revision B 01 Aug 18 5 Revision B 01 Aug 18 6 Revision B 01 Aug 18

7 Revision B 01 Aug 18 8 Revision B 01 Aug 18 9 Revision B 01 Aug 18

10 Revision B 01 Aug 18 11 Revision B 01 Aug 18 12 Revision B 01 Aug 18

13 Revision B 01 Aug 18 14 Change 3 18 Jul 19

9390-1 1 Revision B 01 Aug 18

9390-2 1 Revision B 01 Aug 18

9390-3 1 Change 5 15 Jan 20 2 Change 5 15 Jan 20

9390-4 1 Revision B 01 Aug 18

9390-5 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18 3 Revision B 01 Aug 18

9390-7 1 Revision B 01 Aug 18 2 Revision B 01 Aug 18

9400-0 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18

9400-1 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18 3 Revision B 01 Aug 18 4 Revision B 01 Aug 18 5 Revision B 01 Aug 18

9400-2 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18 3 Revision B 01 Aug 18 4 Revision B 01 Aug 18

5 Revision B 01 Aug 18 6 Revision B 01 Aug 18

7 Revision B 01 Aug 18

9410-1 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18

9410-8 1 Revision B 01 Aug 18

9410-11 1 Revision B 01 Aug 18

9420-1 1 Revision B 01 Aug 18

9420-2 1 Revision B 01 Aug 18

9430-1 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18

9430-2 1 Revision B 01 Aug 18

9440-1 1 Revision B 01 Aug 18

9450-1 1 Change 2 17 Jan 19

2 Change 2 17 Jan 19 3 Change 4 15 Oct 19

4 Revision B 01 Aug 18

9460-1 1 Revision B 01 Aug 18

9470-1 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18 3 Revision B 01 Aug 18

9480-0 1 Change 2 17 Jan 19

2 Change 2 17 Jan 19 3 Change 2 17 Jan 19 4 Change 2 17 Jan 19 5 Change 2 17 Jan 19

6 Change 2 17 Jan 19 7 Change 2 17 Jan 19 8 Change 2 17 Jan 19

9 Change 2 17 Jan 19 10 Change 2 17 Jan 19

Section Page ACN No. Page Date 9480-0 (cont)

11 Change 2 17 Jan 19 12 Change 2 17 Jan 19

13 Change 2 17 Jan 19 14 Change 2 17 Jan 19

15 Change 2 17 Jan 19 16 Change 2 17 Jan 19 17 Change 2 17 Jan 19 18 Change 2 17 Jan 19

19 Change 2 17 Jan 19 20 Change 2 17 Jan 19 21 Change 2 17 Jan 19 22 Change 2 17 Jan 19 23 Change 2 17 Jan 19 24 Change 2 17 Jan 19 25 Change 2 17 Jan 19 26 Change 2 17 Jan 19

9480-1 1 Revision B 01 Aug 18

9480-2 1 Revision B 01 Aug 18

9480-4 1 Revision B 01 Aug 18

9480-8 1 Revision B 01 Aug 18

9480-9 1 Revision B 01 Aug 18

9480-10 1 Revision B 01 Aug 18

9490-1 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18 3 Revision B 01 Aug 18

9500-1 1 Revision B 01 Aug 18

9520-2 1 Revision B 01 Aug 18

9550-1 1 Revision B 01 Aug 18

9560-1 1 Revision B 01 Aug 18

9580-1 1 Revision B 01 Aug 18

9590-1 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18

9590-2 1 Revision B 01 Aug 18

2 Change 5 15 Jan 20

9600-0 1 Revision B 01 Aug 18

9610-1 1 Revision B 01 Aug 18

3 Revision B 01 Aug 18

9610-4 1 Revision B 01 Aug 18

9620-0 1 Revision B 01 Aug 18

9620-1 1 Revision B 01 Aug 18

2 Change 3 18 Jul 19

9620-2 1 Revision B 01 Aug 18

3 Revision B 01 Aug 18 4 Revision B 01 Aug 18 5 Revision B 01 Aug 18 6 Revision B 01 Aug 18 7 Revision B 01 Aug 18 8 Revision B 01 Aug 18 9 Revision B 01 Aug 18

10 Revision B 01 Aug 18 11 Revision B 01 Aug 18 12 Revision B 01 Aug 18 13 Revision B 01 Aug 18 14 Revision B 01 Aug 18 15 Revision B 01 Aug 18 16 Revision B 01 Aug 18 17 Revision B 01 Aug 18 18 Revision B 01 Aug 18 19 Revision B 01 Aug 18

20 Revision B 01 Aug 18

Section Page ACN No. Page Date

9620-3 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18

9620-4 1 Revision B 01 Aug 18

9620-5 1 Revision B 01 Aug 18

9620-6 1 Revision B 01 Aug 18

9620-7 1 Revision B 01 Aug 18

9630-1 1 Revision B 01 Aug 18

9640-1 1 Revision B 01 Aug 18

9650-0 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18 3 Revision B 01 Aug 18

9650-1 1 Revision B 01 Aug 18

9650-8 1 Change 2 17 Jan 19

2 Change 2 17 Jan 19

9670-0 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18 3 Revision B 01 Aug 18 4 Revision B 01 Aug 18 5 Revision B 01 Aug 18 6 Revision B 01 Aug 18

9670-1 1 Revision B 01 Aug 18

3 Revision B 01 Aug 18

9670-2 1 Revision B 01 Aug 18

9710-1 1 Revision B 01 Aug 18

9710-2 1 Revision B 01 Aug 18 2 Revision B 01 Aug 18

9730-1 1 Revision B 01 Aug 18

9780-1 1 Revision B 01 Aug 18

9780-6 1 Revision B 01 Aug 18

9820-1 1 Revision B 01 Aug 18

9870-1 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18

9880-0 1 Revision B 01 Aug 18

9930-1 1 Revision B 01 Aug 18

9940-1 1 Revision B 01 Aug 18

2 Revision B 01 Aug 18

9950-1 1 Revision B 01 Aug 18

475 1 Revision B 01 Aug 18 i

GENERAL OVERHAUL SPECIFICATIONS FOR DEEP DIVING SSBN/SSN SUBMARINES

DEPARTMENT OF THE NAVY NAVAL SEA SYSTEMS COMMAND

TABLE OF CONTENTS

Section Title Section Title

5000-0 General Administrative Requirements 9140-1 Deck Covering

9020-0 General Requirements for Availabilities 9160-1 Access

9020-1 Drawings 9160-2 Doors, Hatches, and Manhole Covers

9020-2 Care of Ship During the Availability 9160-4 Ladders, Hand Rails, Floor Plates, and Gratings

9020-3 Fire and Flooding Protection 9160-5 Trunks, Plugs, and Chambers

9020-5 Technical Publications 9170-2 Masts, Fairings, and Periscopes

9020-6 Government-Furnished Material 9180-2 Protective and Security Covers

9020-9 Shipboard Tests 9190-1 Painting

9080-1 Post-Availability Ship Trials 9190-3 Zinc Coating

9090-1 Welding, Riveting, and Allied Processes 9190-6 Cathodic Protection

9090-3 Threaded Fasteners 9200-1 Capstans

9090-4 Castings 9210-1 Hydraulic Power Transmission Systems

9100-1 Work Pertaining to Other Commands 9220-1 Rudders and Diving Planes

9110-0 General Requirements for Hull Structure 9220-3 Steering and Diving Gear

9110-1 Shell Plating 9220-4 Fly-By-Wire Ship Control System

9110-3 Framing for Shell Plate 9230-1 Compressed Gas Systems

9110-5 Bulkheads and Partitions 9240-1 Control and Communication Station

9110-6 Decks and Platforms 9260-1 Anchor, Chain and Windlass

9110-9 Structural Stanchions 9280-1 Machinery and Piping Designation and Marking

9110-12 Foundations 9280-2 Electrical Designation and Markings

9110-16 Superstructure 9280-3 Hull Designation and Marking

9110-17 Fairwater 9280-6 Draft Marks

9120-1 Mooring and Towing Fittings 9290-1 Weights

9120-4 Locks, Keys, and Tags 9290-3 Inclining Experiment and Trim Drive

9120-5 Hull Fittings 9290-8 Compartment Testing

9290-12 Stability and Equilibrium ii

GENERAL OVERHAUL SPECIFICATIONS FOR DEEP DIVING SSBN/SSN SUBMARINES

9300-1 Storerooms and Issue Rooms 9420-2 Propulsion Clutches and Couplings

9300-3 Special Stowage Arrangements 9430-1 Propulsion Shafting, Bearings and Seals

9310-1 Repair Parts 9430-2 Propulsion Shaft Bearings and Vibration

Reducer (VR)Systems

9330-0 General Requirements for Living, Messing and

Recreation Spaces 9440-1 Propellers and Ducted Propulsors

9340-1 Commissary Spaces 9450-1 Lubrication Systems

9350-1 Laundry 9460-1 Steam Condensers, Sea Water Heat Exchangers and Air Ejectors

9360-1 Plumbing 9470-1 Pumps

9360-4 Trash Disposal Unit and Trash Compactor 9480-0 General Requirements for Piping Systems

9370-1 Medical Facilities 9480-1 Drainage and Ballasting Systems

9380-1 Ventilation, Heating, and Cooling 9480-2 Machinery and Piping Drainage

9390-1 Thermal Insulation and Acoustic Absorptive

Treatment of Compartments 9480-4 Fresh Water Service Systems

9390-2 Thermal Insulation for Machinery and Piping 9480-8 Plumbing and Deck Drains

9390-3

Vibration Damping Materials and Acoustic

Absorber, Reflector & Decoupler Tiles 9480-9

Overflows, Air Escapes, Plumbing Vents, and

Sounding Arrangements

9390-4 Thermal Insulation of Refrigerated Spaces 9480-10 Steam Systems

9390-5

Thermal Insulation and Acoustic Absorptive

Treatment for Ducts and Trunks 9490-1 Compressed Air Systems

9390-7 Transmission Loss Treatments (TLT) 9500-1 Auxiliary Machinery

9400-0 General Requirements for the Machinery Plant 9520-2 Internal Combustion Engine Exhaust Systems

9400-1 Noise and Vibration 9550-1 Fuel Systems

9400-2 Shock 9560-1 Condensate and Feed Water Systems

9410-1 Propulsion Steam Turbines 9580-1 Distilling and Reverse Osmosis Plants

9410-8 Secondary Propulsion System 9590-1 Air Conditioning Plants

9410-11 Submarine Electric Propulsion Systems 9590-2 Refrigeration Plants

9420-1 Propulsion Reduction Gears 9600-0 General Requirements for Electric Plant

9610-1 Ship Service Turbine and Diesel Generator Sets iii

GENERAL OVERHAUL SPECIFICATIONS FOR DEEP DIVING SSBN/SSN SUBMARINES

9610-4 Electric Power Supply Conversion Equipment 9780-6 Fleet Ballistic Missile Handling, Stowage, and

Launching Systems

9620-0 General Requirements for Electric Power

Distribution Systems 9820-1 Inflatable Life Rafts

9620-1 Switchboards, Group Controllers and Panels for

Electric Power and Lighting 9870-1 Instruments and Instrument Boards

9620-2 Electric Cable 9880-0 Damage Control Book

9620-3 Electrical Distribution and Wiring 9930-1 Fire Extinguishing Systems

9620-4 Equipment Portable Storage Batteries 9940-1 Rescue Equipment

9620-5 Protective Devices for Electrical Circuits 9950-1 Towed Sonar Array Cable Handling System

9620-6 Fiber Optic Cable Plant 475 Circuit D (Degaussing) Systems (VIRGINIA

Class and SEAWOLF Class) (New)

9620-7 Fiber Optic Cables

9630-1 Electric Motors and Associated Electrical

Equipment

9640-1 Lighting Systems

9650-0 General Requirements for Interior

Communication Systems

9650-1 Telephone Systems

9650-8 Switchboards for Interior Communication and

Weapon Control Systems

9670-0 General Requirements for Electronics Systems

9670-1 Radio Frequency (RF) Transmission Lines

9670-2 Secure Electrical Information Processing

Equipment and Systems and Secure Processing

Centers

9710-1 Weapons Control Systems

9710-2 Strategic Weapons System Test Instrumentation

9730-1 Torpedo Tube Armament

9780-1 Weapon Handling and Stowage Systems for

Submarines

REVISION B 1 5000-0

FOR DEEP DIVING SSBN/SSN SUBMARINES

SECTION 5000-0

GENERAL ADMINISTRATIVE REQUIREMENTS

CONTENTS

Paragraph Title Page

5000-0-a. Intent 5000-0-b. Definitions 5000-0-c. Specifications, Standards, and Standard and Type Drawings 5000-0-d. SUBSAFE Certification 5000-0-e Fly by Wire Ship Control Systems (FBW SCS) and Submarine Flight Critical Components (SFCC) 5000-0-f. System Certification Procedures and Criteria for Deep Submergence Systems 5000-0-g. NAVSEA Submarine Availability Completion Program 5000-0-h. Other Requirements 5000-0-i. Care of Ship During Availability 5000-0-j. Fire and Flooding Protection During Availability 5000-0-k. Correspondence 5000-0-l. Purchase Orders 5000-0-m. DDGOS Change Procedures

5000-0-a. Intent

This section contains non-technical requirements and procedures, the intent of the General Overhaul Specifications (DDGOS), definitions of administrative terms, specification requirements, schedule and correspondence requirements, and similar requirements.

The Availability Work Package (AWP) is the sole work authorizing document. The DDGOS shall not be used as a work authorizing document. The DDGOS establishes a compendium of NAVSEA requirements for the administration and conduct of submarine depot availabilities. The work authorizing activity shall ensure that the applicable technical requirements are invoked for all authorized work assigned to the availability activity. It is the responsibility of the availability activity to accomplish all work authorized and comply with corresponding applicable technical requirements. Non-conformance with technical requirements (including NAVSEAINST C9210.4) shall be processed in accordance with Section 9020-1.

In general, requirements for new and modified systems and requirements for overhaul of existing systems are identified within each section. Where no distinction is made, the requirements for overhaul and new installations or modified systems are identical.

Where technical guidance is not considered adequate for new installations or modified systems the contractor shall request appropriate guidance from NAVSEA.

5000-0-b. Definitions

As used throughout the DDGOS, the following terms having meanings as indicated:

Availability - A specific period of time in a submarine life-cycle, designated by the CNO to perform maintenance and modernization requirements necessary to maintain the ship in a safe material condition, adequate to allow accomplishment of assigned missions. A Major Industrial Availability is a scheduled availability of 6 months duration or longer.

Contractor - A firm holding a prime contract with the Government for the ship design, or for the ship work, or both. Where the work is being done by a naval shipyard, the term “contractor” shall refer to the Shipyard Commander.

Design Data Sheet (DDS) - A document that contains material for information and guidance of personnel engaged in design work applicable to availability of ships. It illustrates typical design and calculation methods and procedures which are acceptable to NAVSEA.

Drawings - For definition, see 9020-1 Maintenance Standard - A document that specifies NAVSEA minimum requirements for acceptable Intermediate/Depot level refurbishment of submarine components, including testing/inspection criteria and parts replacement. (Formerly Technical Repair Standards, IMMP Maintenance Requirement Card, TRIDENT Maintenance Requirement Procedure, SEAWOLF Maintenance Standard, Submarine Maintenance Standard, etc.)

REVISION B 2 5000-0

Modified System - A system which has deletions, additions, or relocations.

Naval Ship's Technical Manual (NSTM) NAVSEA Publication S9086-00-STM-000 - A NAVSEA publication whose purpose is to provide technical information to personnel engaged in the supervision, operation, or maintenance of ships of the United States Navy.

NAVSEA - The Headquarters of the Naval Sea Systems Command, supersedes NAVSHIPS and NAVORD.

Where the term NAVSEA is used in these specifications in connection with letters, instructions, and manuals, it shall be understood to include existing non-canceled documents still having NAVSHIPS/ NAVORD designation.

New System - A system not previously installed.

Noise Control Drawings - System diagrams or working drawings which depict noise control features or information. Noise control drawings are so designated on the drawings and are annotated to identify areas containing noise control features.

Non-Deviation Drawings (NDD) - Formal drawing designations applied to certain submarine drawings to control design and fabrication during new construction.

Ordnance Drawings -Drawings which control design and fabrication of torpedo tubes.

Overhauled System - A system which is refurbished but not changed, except for replacement of defective equipment.

Selected Record Data (SRD) - That important basic technical information relative to certain shipboard arrangements, equipment and systems under the cognizance of NAVSEA, selected for its value for reference and consulting purposes to the ship's operating forces, planning yards, depots, training commands and other naval activities.

Selected Record Drawings (SRD’s) - SRD’s are a subset of Selected Record Data. These are designated groups of drawings applicable to an individual ship illustrating final shipboard installations of important features, systems and arrangements. They must be maintained up to date and correct throughout the life of the ship.

ShipAlt Installation Drawings - Those drawings which are utilized for the accomplishment of Non-Nuclear Ship Alteration (S/A) work.

SSP - Strategic Systems Programs, supersedes Strategic Systems Programs Office, SSPO.

Standard Drawings - NAVSEA drawings illustrating arrangement and details of equipment, systems or components from which no departure in the manufacturing or parts or intent of use is permitted without approval.

Supervisor/Supervising Authority- The cognizant Supervisor of Shipbuilding, Conversion and Repair, USN (SUPSHIP). Under certain conditions specific duties of the Supervisor may be transferred to a Defense Contract Management Command Activity, in which case that activity assumes the responsibilities and duties of the Supervisor. The Shipyard Commander assumes the responsibilities and duties of the Supervisor where the work is being done by a naval shipyard. Whenever terms such as “as approved,” “as required”, “or equal”, “as directed”, “when necessary”, and “approved equivalent” are used without further qualifications, the decision of the Supervisor is intended.

Technical Variance Documentation (TVD)- Refer to Section 9020-1.

Test Depth – For the purpose of the proper method of measuring and specifying Test Depth the following applies.

Test Depth shall be measured to the bottom of the keel for all types of submarine operations. Builders trials and trails following major industrial activity availabilities greater than six months, shall be at a tolerance of plus zero

(0) minus 20 feet of Test Depth when specified. All other trials can be conducted at 95 to 100% of Test Depth to satisfy all the requirements specified for 100% Test Depth.

Type Drawings - NAVSEA drawings illustrating systems or components which may be subject to development by the contractor to assure full compliance with these specifications.

5000-0-c. Specifications, Standards, and Standard and Type Drawings

Notices, instructions, letters, publications, and standard, vendor and type drawings referenced herein form a part of these specifications and shall be those in effect on the date specified in the AWP or in the applicable availability contract. Subject to approval of the Supervisor, the contractor may use later or earlier issues or alternates of Industry, Federal, or Military Specifications and Standards, vendor drawings and NAVSEA standard and type drawings. It is the installing activities responsibility to assure that the item or material which is in accordance with a document other than the effective issue is not technically inferior to and is interchangeable.

In cases of inconsistency between specifications, the following order of precedence applies:

1. Applicable Availability Contract

2. Applicable Availability Work Packages (AWP)

3. DDGOS

4. Government specifications, NAVSEA standard and type drawings, approved maintenance standards, and other referenced documents.

5. Silence of one document with respect to details shown in another shall not be considered an inconsistency.

Where this specification is silent the requirements of the original ships specification shall prevail.

REVISION B 3 5000-0

5000-0-d. SUBSAFE Certification For SUBSAFE related requirements, refer to NAVSEA 0924-LP-062-0010.

5000-0-e. Fly by Wire Ship Control Systems (FBW SCS) and Submarine Flight Critical Components (SFCC)

For FBW SCS and SFCC related requirements refer to NAVSEA T9044-AD-MAN-010, Requirements Manual For Submarine Fly-By-Wire Ship Control Systems and Section 9220-4.

For submarines after delivery, any non-conformance within the FBW SCS and SFCC boundary shall be administered in accordance with Section 9020-1 and NAVSEA T9044-AD-MAN-010, Requirements Manual For Submarine Fly-By-Wire Ship Control Systems.

5000-0-f. System Certification Procedures and Criteria For Deep Submergence Systems

For Deep Submergence Systems Scope of Certification (DSS SOC) related requirements, refer to NAVSEA S800- AG-MAN-010/ P-9290, System Certification Procedures and Criteria Manual For Deep Submergence Systems.

5000-0-g. NAVSEA Submarine Availability Completion Program

The requirements of the Submarine Availability Completion Program can be found in Attachment I to the

DDGOS.

The contractor shall use the NAVSEA Submarine Availability Completion Program to document accomplishment of all requirements necessary to ensure satisfactory completion of Major Industrial Availabilities. Compliance with all applicable requirements shall be reported to NAVSEA prior to Fast Cruise by forwarding a completed copy of the Supervising Authority Availability Completion Checklist (Appendix A of NAVSEA Submarine Availability Completion Program).

Additionally, following initial sea trials, anytime the ship goes to sea prior to availability completion, the contractor shall provide verification that the approval signatures in Appendix A are still valid for all applicable items, or re-submit updated pages of Appendix A.

5000-0-h. Other Requirements

The contractor is responsible for carefully and critically reviewing drawings, if provided, and the specifications immediately upon receipt. In case of error, omission, discrepancy or lack of clarity in the drawings or the specifications, the contractor shall promptly notify the Supervisor requesting clarification. Work performed based on such an error, omission, discrepancy, or lack of clarity shall be at the contractor's own risk.

Approval of drawings or waiver of drawing approval by the Government shall not relieve the contractor of his obligations to meet the requirements. It is the contractor's responsibility to establish that his drawings are fully in accordance with the requirements.

Allowance List - The contractor shall provide such data as may be required by the Supervisor to aid in the preparation of the Allowance List such as the COSAL Tender/TRF load list, etc.

Non-conformances - Non-conformances to specifications shall be dispositioned in accordance with section 9020- 1.

5000-0-i. Care of Ship During Availability

Refer to section 9020-2.

5000-0-j. Fire and Flooding Protection During Availability

Refer to section 9020-3.

5000-0-k. Correspondence

All correspondence of the contractor with NAVSEA, however addressed, shall be submitted via the Supervisor. In general, subjects relating to payments, changes, or delivery shall be covered by separate letters. Other subjects may be covered by single letters.

The contractor's correspondence shall be signed by his authorized representatives. The contractor shall furnish the Supervisor with lists of the names of these representatives.

All letters sent to the Supervisor by the contractor shall be accompanied by the number of copies directed by the Supervisor.

5000-0-l. Purchase Orders

Copies of all purchase orders and changes thereto shall be furnished to the Supervisor upon request. Purchase orders shall contain complete information as to applicable specifications and drawings, firm name, address of subcontractor or vendor, the location of the material, time of completion, and similar information.

If the applicable equipment specification does not contain MIL-Q-9858, each procurement request issued in fulfillment of these specifications shall invoke MIL-I-45208 or ISO-9002 or directly specify the following:

1 The inspection and test requirements associated with the procurement do not relieve the vendor of his responsibility to provide a high quality product which meets all specification requirements.

2 If, during the availability, equipment fails to meet all contract requirements, as determined either by contractor or Government inspections, the contractor is financially responsible for correcting these conditions.

REVISION B 4 5000-0

3 Navy inspection or exemption of inspection at source of manufacture will be in accordance with the requirements of the Supervisor.

If ISO-9001 or ISO-9002 are invoked specify the following:

1. The Government may inspect, at the contractor’s or subcontractor’s plants, all supplies or services manufactured or performed for the Government.

2. The Government may review all documents and referenced data related to Government contracts.

3. The contractor’s quality and inspection systems are subject to evaluation and verification inspections by the

Government.

5000-0-m. DDGOS Change Procedures

Change Proposals (CP's) may be initiated by users of the DDGOS. DDGOS CP's are to be submitted to NAVSEA 05U7C using the SUBMEPP Product Feedback form, with copy to SUBMEPP, and must provide the following information:

1. Product (DDGOS UACS).

2. Title of section, section number, REV.

3. Name, code/shop, phone, email, class/hull, fax, activity, originator tracking number, submittal date.

4. Priority of CP. CP's which impact personnel or ship safety should be assigned "URGENT" priority, with an indicated actual need date. All other CP's should be assigned "ROUTINE" priority.

5. Problem - explicit instructions as to what words, lines or paragraphs are proposed to be deleted or added must be provided in the CP. The CP originator should describe the change exactly as they want it to be.

6. Solution - a comprehensive discussion of either the problem the CP intends to correct or the new capability the

CP intends to provide. The nature of the defect, failure, incident, malfunction, etc., shall be described in detail, substantiating the need for change. The estimated cost impact per ship if the proposed change is implemented.

If practical, the estimate should include total installation costs (e.g.; testing, Tech Manual update, Selected Record Data update, etc.)

All approved changes to the DDGOS will be incorporated on the SUBMEPP secure website, and incorporated into the next release of the NAVSEA digital library CD-Rom distributed by SUBMEPP.

REVISION B 1 9020-0

FOR DEEP DIVING SSBN/SSN SUBMARINES

SECTION 9020-0

GENERAL REQUIREMENTS FOR AVAILABILITIES

9020-0-a. General 9020-0-b. Materials 9020-0-c. Requirements for Materials, Equipment, and Machinery 9020-0-d. Workmanship 9020-0-e. Inspection and Material Identification 9020-0-f. Submarine Safety Requirements 9020-0-g Nuclear/Non-Nuclear Interface Design and Installation Requirements 9020-0-h. Material Identification and Control Requirements for Material within the SUBSAFE Certification

Boundary

9020-0-a. General

General - The information contained in this section is intended to serve as a guide for standards of materials, workmanship, inspections, and tests required by changes effected during availabilities. Requirements of other sections of the DDGOS or referenced Industry or Government specifications and drawings, which are in excess of the requirements of this section, shall have precedence over the requirements of this section when specifically invoked. Requirements of original building specifications shall pertain for material selection, fabrication, method and design of components and systems in the propulsion plant except where NAVSEA has waived or changed requirements. The use of alternate specifications shall require NAVSEA’s approval prior to their use.

For 726 Class submarines, all maintenance related actions including corrective, preventative, replacement, inspections, modifications, reconditionings and new installations will be identified in the Engineered Overhaul Work Package (EOHWP). Repairs shall be in accordance with the 726 Class Maintenance Plan (NAVSEA T9 SSB-X9- SHP-010). Modifications shall be in accordance with approved ship alteration documents. Component testing will be included in the maintenance requirement procedures and system testing will be in accordance with the Standardized Test Programs and Integrated Test Requirement Outline (ITRO). OHIO Class submarines have an extensive configuration management status accounting system. It is therefore mandatory that all work be accomplished in accordance with NAVSEA drawings and documentation. Any installation or material requirement which cannot be completed IAW existing drawings or approved alteration drawings shall be specifically approved in accordance with the process provided in 9020-1.

Control of testing and ship conditions shall be in accordance with NAVSEA 0905-LP-485-6010, Manual for Control of Testing and Ship Conditions.

Information delineating the design and technical requirements for specific work requirements for the availability is included in other sections of the DDGOS.

Requirements herein apply to any supervisor specification requirements pertaining to structure, fittings, equipment, and installations. Existing structure, fittings, and installations need not be altered unless necessary to comply with the availability requirements. Existing fittings and equipment that are in good and acceptable condition, unless otherwise specified, may be reused to the maximum practicable extent subject to the approval of the Supervisor.

It is the intent that the contractor shall alter and complete the ship in every respect as required by the contract. This includes modification, installation, inspection, and testing of all systems involved, removal of existing redundant items, and preparation of required operating manuals and technical manuals.

Authorization of alterations, changes and arrangement variations shall be in accordance with NAVSEA SL720- AAMAN-010, FMP Management and Operations Manual.

Any part of the ship, such as wiring, wire-ways, cable straps, fixtures, piping, hangers, foundations, insulation, duct work, or other items of the ship which the availability requirements make redundant, inoperative or unnecessary, shall be removed from the ship by the contractor unless otherwise approved by the Supervisor. All areas damaged or exposed by such removals shall be repaired, closed in, and finished out by the contractor in a neat and workmanlike manner matching the surrounding area in material, degree of tightness, and finish painting.

The above described installations, removals, repairs, and modifications shall be accomplished by the contractor regardless of whether or not they are specifically called for by the availability requirements and regardless of any

REVISION B 2 9020-0

interpretation to the contrary the contractor may place or seek to place on any provision or requirement of the availability.

All items, including scrap, removed and not required to complete the work shall remain the property of the Government. Such items shall be stowed and suitably protected until disposed of as directed by the Supervisor.

Environmental conditions, including climatic and ship motion conditions, shall be as required by the original ship specifications unless otherwise approved.

Standardization and Interchangeability - All ships of the same design class under a single availability Contract shall have identical machinery and equipment arranged and located identically in new areas common to one or more ships to the maximum extent practicable; exceptions to be approved by the Supervisor.

For individual ships, machinery and equipment, installed during the availability, which are functionally interchangeable shall also be identical in form, fit, and function. As used herein, the term “machinery and equipment” refers to hull, mechanical, electrical, and electronic items that can be maintained by the replacement of parts; the term “functionally interchangeable” means that two or more items are sufficiently alike in all essential respects to permit replacement of one such item by the other in all applications where the item is used without modification of either the item or the system in which the item is used. New or modified portions of systems shall be designed to minimize configuration variation of systems, systems architectures, sub-systems and components (such as valves, motors, and controllers). NAVSEA has established a Virtual Shelf which supports the requirements for standardization, minimization of configuration variation (Commonality), and interchangeability. The Virtual Shelf provides proven standard architectures, design guidelines, specifications, certified systems, components, and parts which support cross platform requirements (to minimize configuration variation) and provides the lowest Total Ownership Cost (TOC).

Unless otherwise specifically approved by NAVSEA, “part common” materials (such as piping, tubing, electrical cable, and electrical fittings) shall be standard material in the Federal Supply System (FSS), or where non-standard equipment is used, an acceptable FSS substitute shall be indicated on the appropriate working drawings or material lists.

It is Navy policy to make every effort to achieve and maintain standardization throughout the life cycle of its ships.

Intra-Navy Standardization - This is achieved by selecting and acquiring equipment or components for new ships or requirements which are already in the Navy inventory and fully supported. The NAVSEA Virtual Shelf, in accordance with NAVSEAINST 4120.8 series, provides a list of hull, mechanical, and electrical, warfare systems;

subsystems; proven standard architectures, design guidelines, specifications, components; and related software which are available for procurement, and are supported by spare parts available from the original equipment manufacturer. This list should be used in the design selection process for assistance in identifying standard equipment. The Supervisor shall be notified of exceptions from the Virtual Shelf. The Supervisor shall submit a Feedback Report (available on the Virtual Shelf website) to NAVSEA 06 when exceptions are utilized to improve the value of the Virtual Shelf. The order of precedence of sources for machinery, equipment, parts, and material after use of the Virtual Shelf shall be items already used on the ship class, items already used in the fleet, the National Shipbuilding Research Plan (NSRP) Common Parts Catalog (CPC), or Naval Shipyards Standard Parts Catalog (SPC).

Note that some equipment must have cognizant Project approval and may not be contained in Virtual Shelf. This includes, but is not limited to, some Foodservice, Laundry, Security, and Pollution Prevention equipment.

In addition to requirements for equipment standardization in new design and equipment changes or replacements, consideration should be given to eliminating unsupported equipment when economically feasible. The NAVSEA Diminishing Manufacturing Sources and Material Shortages (DMSMS) program provides lists of equipment installed in the fleet which are no longer supported with spare parts by the original equipment manufacturer. This list should be used to identify such equipment for consideration for replacement. The NAVSEA Virtual Shelf should be applied in support of DMSMS, if applicable.

Human Engineering Design - Direction of movement, arrangement, and grouping of controls as well as other standardization efforts shall be in accordance with MIL-STD-1472 whenever applicable.

9020-0-b. Materials

General - Any material furnished and installed by the contractor during the availability, and whether previously accepted or not, which proves defective and unfit for service either before or after incorporation into the ship or any of its equipment or machinery shall be replaced with satisfactory material without extra cost to the Government as provided by contract.

Approved revisions to material specifications may be used subject to local engineering approval.

The specifying of material requirements for hull or machinery material in these specifications, and the listing of applicable government specifications shall not relieve the contractor of any obligation under the terms of the contract for the performance of any hull or machinery apparatus or equipment.

The contractor shall remove or relocate any parts of the ship, its fittings, or equipment, as necessary to accomplish the work specified; however, all such material removed or relocated shall be itemized and subsequently replaced, as required.

REVISION B 3 9020-0

Carbon Steel Tube and Pipe - Carbon steel tube and pipe for piping systems and structural applications shall be in accordance with MIL-T-20l57, (Cancelled, S/S by MIL-P-24691) Type E or MIL-P-24691/1. For piping systems, only one thickness for each size shall be ordered and shall be that required for the severest piping service for that size. For structural applications, the thickness of circular tube or pipe shall be at least that required for the severest piping service for that size. Square and rectangular steel tubing of material in accordance with the standard carbon steels listed in ASTM A500, Class B, or ASTM A501 may be used for structural applications.

High Yield Strength Steel - Wherever high yield strength steel is specified herein for structural purposes, or required by referenced equipment specifications, only nickel-chromium-molybdenum steel (HY-80 or HY100, as applicable) conforming to the following shall be used:

MIL-S-16216 (Cancelled, S/S by T9074-BD-GIB-10/300) for plates MIL-S-23008 (Cancelled, S/S by T9074-BD-GIB-10/300) for castings MIL-S-23009 (Cancelled, S/S by T9074-BD-GIB-10/300) for forgings MIL-S-22664 (Cancelled, S/S by T9074-BD-GIB-10/300) for extruded shapes MIL-S-22958 (Cancelled without replacement) for hot rolled shapes MIL-S-21952 (Cancelled, S/S by T9074-BD-GIB-10/300) for bars

"High yield strength" is defined as a value of yield strength greater than 75,000 psi. at 0.2% offset. If the contractor proposes the use of alternative materials, the proposal shall be submitted to NAVSEA for approval, and shall include the specific intended use, the chemical composition, the mechanical properties, (including Charpy values), and other characteristics considered pertinent to the application.

Alternative Materials - The use of materials differing from those specified for a given application will be considered by NAVSEA or the Supervisor when the contractor shows the necessity for such substitution, when the material proposed is a satisfactory alternative, and when the alternative material is readily obtainable.

Brittle Material - Brittle material is material showing less than 10% elongation in two inches for the standard tensile test. For the static loading case (normal ship operation) brittle material is material being used below its NDT (Nil Ductility Transition) temperature as measured by the Naval Research Laboratory drop weight test. Charpy V-notch impact strength values may be used as criteria when these have been correlated with drop weight test results.

Brittle material shall not be used except where approved for a particular application or where its suitability is proven by mechanical shock tests.

Electrolytically Dissimilar Materials - To prevent destructive electrolysis, direct contact of electrolytically dissimilar metals is not permitted except where specifically exempted by NAVSEA.

Dissimilar metals shall not be separated by spaces or materials capable of holding water. Where joints or such separations are unavoidable, they shall be sealed against contact with water.

Aluminum Alloys - Threading directly into aluminum alloys is prohibited unless authorized by the Supervisor.

Requirements for the attachment of aluminum alloy fittings to structure, or of fittings of other material to aluminum alloy structure, are contained in 9110-0.

Magnesium - Magnesium and its alloys shall not be used for structural members or equipment under the cognizance of NAVSEA.

The specific approval of the Supervisor shall be obtained for all installations and stowage involving magnesium and its alloys.

Mercury - The use of mercury shall be controlled in accordance with the requirements of NAVSEAINST 5100.3.

Aluminum Bronze - Aluminum bronze materials subject to sea water shall conform to the following material specifications:

Nickel, aluminum bronze - MIL-B-24480 Nickel, aluminum bronze - MIL-B-21230 (Cancelled without replacement) alloy 1 (minimum 4% nickel) (for propellers only).

MIL-B-21230 (Cancelled without replacement) existing stock may continue to be used for non-pressure containing castings with approval of the cognizant shipyard engineering organization.

Nickel, aluminum bronze - ASTM B150, Alloy C63200 or QQ-C-00465B (Cancelled, S/S by: ASTM-B124, ASTM-B150, ASTM-B169M, ASTM-B283) (NAVY-SH), Amendment 1, copper alloy C63200 (MIL-B-24059 (Cancelled, S/S by QQ-C-00465B, (Cancelled, S/S by ASTM-B124, ASTM-B150, ASTM-B169M, ASTM- B283) existing stock may continue to be used).

The forgings listed in the preceding paragraph may be used in place of MIL-B-24480 and MIL-B-21230 (Cancelled without replacement) castings with technical evaluation and approval by the cognizant shipyard engineering organization.

Inconel 625 – Inconel 625 in contact with seawater is susceptible to crevice corrosion. Inconel 625 shall not be used in contact with O-rings in seawater systems. A weld overlay of Alloy C276 can be used to prevent crevice corrosion at O-ring seals in Inconel 625 piping.

Black oxide coated brass threaded fasteners present a potential threat for improper installation, particularly in place of steel fasteners which may also be black oxide coated. For all applications, use the requirements for black oxide coated brass fasteners contained in the applicable section in the NSTM Chapter 075, Fasteners.

Lubricants and Penetrating Fluid – For SSN21 Class only, standard lubricants and penetrating fluid for equipment and associated piping systems shall be in accordance with NAVSEA Drawings 8801-6409058 and 802-

REVISION B 4 9020-0

6726204. Standard lubricants and penetrating fluid shall be used for equipment and associated piping systems as required by NAVSEAINST 9210.41, except where red lead and graphite in mineral oil per MIL-L-24479 is specified as a thread lube. Where documents specify the use of red lead and graphite in mineral oil per MIL-L- 24479, instead use antigalling compound per CID A-A-59004. This substitution does not apply where the document states “use of red lead and graphite in mineral oil per MIL-L-24479 is an approved exception to NAVSEAINST 9210-.41” or similar. Documents that specify the use of red lead and graphite in mineral oil per MIL-L-24479 in propulsion plant applications, but are not approved exceptions, should be reported to NAVSEA as discussed in NAVSEAINST 9210-41. For non-nuclear propulsion plant and non-propulsion plant bolted joints, anti-galling compound CID A-A-59004 shall be substituted for red lead and graphite in mineral oil per MIL-L-24479. When installation torques for use with red lead and graphite in mineral oil per MIL-L-24479 are specified on drawings or in technical manuals, the same torques may be utilized with anti-galling compound per CID A-A-59004.

9020-0-c. Requirements for Materials, Equipment and Machinery

General - The contractor shall install, remove or relocate any parts of the ship, its fittings, material, equipment or machinery as necessary to accomplish the work specified.

Operating and maintenance efficiency shall be considered in the design and installation of equipment and machinery.

Equipment and Machinery - Equipment and machinery shall conform in type, size, pattern, and details with the requirements, as set forth herein. If compliance with such requirements is not practicable, the matter shall be submitted with full details to the Supervisor for consideration and action. In general, the standards of design, workmanship, and material for items of equipment and machinery not covered by applicable Government specifications shall not be less than those required by existing Government specifications for comparable items.

Instruments, equipment, fittings, paint, insulation, adhesives, or other items containing material or components that would give off noxious fumes at its operating temperature or at any temperature below 200 °F shall not be installed or applied. For paint and adhesives, this requirement applies after drying or curing is complete.

Contaminants produced from the outgassing of nonmetallic materials under normal operating conditions shall not exceed a toxicity hazard rating of one as defined in Dangerous Properties of Industrial Materials by N. Irving Sax. All nonmetallic materials and components utilizing nonmetallic materials shall require certification unless prior satisfactory operating history aboard nuclear submarines can be demonstrated. The subcontractor shall furnish documentation on the chemical make-up of the material to the purchaser for submittal to NAVSEA for review. If the material is considered by NAVSEA to be acceptable for use, no further evaluation will be required.

If there are questionable chemical properties, and analysis shall be provided by the subcontractor in accordance with DTNSRDDC/SME-86/24, “Manual of Properties for Chemical Analysis of Materials Used in Nuclear Submarines.”

New components shall be designed to safely withstand their test and system design pressures and temperatures.

Except as otherwise specified herein, new design components and systems designed for submergence pressure shall be hydrostically tested in accordance with the original ship specifications.

Nondestructive tests required are listed in the applicable section of the DDGOS.

Installation - The contractor shall be responsible for the care, stowage and installation of Government-Furnished

Material (GFM) in accordance with 9020-6.

The design of machinery, systems, and equipment in machinery spaces, in addition to requirements appearing elsewhere herein, shall be such that continued operation thereof will not be affected when the bilge regions are flooded.

The extent of the bilge regions shall correspond to the existing ship as defined by original construction specification. Machinery, equipment, or material which would be damaged by bilge water shall not be installed in such regions unless it can be suitably protected from the bilge water.

Items to be Furnished and Installed by the Contractor - Except as otherwise indicated in the contract, all structure, material, equipment, and machinery required for the accomplishment of the availability shall be furnished and installed by the contractor.

Commercial Brand Names - Commercial brand names and names of specific manufacturers mentioned in these specifications or referenced documents are intended only to describe the desired quality and construction of the material, equipment, or machinery.