sive, and must include a description of 

 the test set-up, test conditions, instru- 

 mentation and accuracy of measure- 

 ment; 



— up-to-date copies of the manufacturing 

 drawings of each component and system 

 evaluated in the design analysis must be 

 submitted; 



— it is desired, but not a stated require- 

 ment, that there also be submitted such 

 analyses as an information flow diagram, 

 an operational sequence diagram and a 

 human engineering analysis of the in- 

 strumentation and control station lay- 

 out; 



— all materials used within the certifica- 

 tion scope in the design of the vehicle for 

 expected service environments must be 

 justified. This is to determine the possi- 

 bility of galvanic corrosion on adjacent 

 materials, and emission of noxious odors 

 from points, insulation or other compo- 

 nents within the vehicle which may give 

 off such odors below 200°F. Flammable 

 materials are also considered. 



Introduction of New Materials 



To anticipate the introduction of new ma- 

 terials into a rapidly advancing technology, 

 candidate materials and/or components are 

 grouped into the following categories: 

 Category 1: Materials and/or components 

 which have had a considerable 

 amount of fabrication and oper- 

 ational experience in the in- 

 tended environment and for the 

 intended application. Examples 

 are HY 80 and HY 100 plate 

 (MIL-S-16216) for spherical or 

 cylindrical pressure hulls 70/30 

 Cu-Ni (MIL-C-15726) valve bod- 

 ies and lithium hydroxide 

 (LiOH) for COj removal at am- 

 bient pressure. 

 Category 2: Materials and/or components 

 which have had a considerable 

 amount of commercial opera- 

 tional use but lack an apprecia- 

 ble degree of experience in a 

 marine environment or in the 

 proposed application. Examples 

 in this category are given as 

 certain types of aluminum, tita- 



nium and several high and low 

 strength steels. 

 Category 3: Materials and components for 

 which definitive information 

 and experience are not yet 

 available. Examples in this cate- 

 gory are such pressure hull ma- 

 terials as ultra high strength 

 steel, titanium, aluminum, ce- 

 ramics, plastics or glass or com- 

 binations of these. 

 The burden of proof that the material or 

 component is adequate and the justification 

 of the acceptance criteria is upon the appli- 

 cant who must present such to the reviewing 

 board. 



Construetion and Fabrication Processes 



The applicant must also meet various re- 

 quirements in regard to the construction and 

 fabrication processes for systems within the 

 certification scope. These processes include 

 work procedures, heat treating instructions 

 and welding and assembly procedures. In 

 essence, the applicant should include all con- 

 struction and fabrication procedures that af- 

 fect the design performance of the system or 

 component. 



Quality Assurance 



The applicant must demonstrate that an 

 effective quality control program has as- 

 sured that all design requirements of the 

 systems and components within the certifica- 

 tion scope of the submersible are met in 

 order to assure vehicle safety. 



Testing 



Systems within the scope of certification 

 must be tested to demonstrate their ade- 

 quacy, e.g., pressure hull strength, flotation 

 and buoyancy systems, emergency deballast- 

 ing and jettisoning systems, electrical insu- 

 lation integrity and safety features. Three 

 general testing categories are required: 



development tests: To Verify the perfor- 

 mance of materials, mechanical designs 

 and systems which are unique to the 

 marine environment; 



quality assurance tests: To demonstrate that 



the components, materials and fabrica- 

 tion of the vehicle meet the require- 

 ments of design; 



638 



