Corrosion 



"Corrosion fatigue in relation to off-shore structures. 

 Development of alternative to blast cleaning for the pre-treatment of welded 

 areas to ensure adequate adhesion of protective coatings. 



"Paints 



Inter-coat adhesion 



Permeability to water and ions. 



Extension of cathodic protection to splash zone. 



The behaviour of metallic couples under sea-bed conditions, specifically the rate 

 hydrogen evolution, the rate of corrosion and the effect thereon of a covering of 

 sediment containing decaying organic matter. 



Field References 11, 12, 13, 21, 22 



11 DIVING TECHNOLOGY 



12 UNDERWATER HABITATS 



13 UNDERWATER POWER PLANT AND TOOLS 



21 UNDERWATER VIEWING, PHOTOGRAPHY AND OBJECT 

 LOCATION 



22 UNDERWATER COMMUNICATION 



Recommended Topics 



Improved Diver Work Capability 



Development of improved life-support systems and details for shallow, medium 

 and deep depths. These items would include the diving suits themselves (including 

 insulation/heating), decompression chambers, personnel transfer chambers, per- 

 haps underwater habitats (lock-out submersibles), etc. Some fundamental work on 

 basic parameters might be of value, but any system developed must take into 

 account the necessity for it to be economical both to build and operate. 



Development of improved underwater communications system for divers be- 

 tween themselves and to the surface. This brings in the need for improved unscram- 

 bling devices to counteract helium speech. 



Development of greatly improved lighting or other systems to improve visibility 

 underwater, and give the diver 'eyes'. This could include the adaptation, for use 

 underwater, of some methods at present under development for blind people. 



Development of improved light-weight navigation and homing systems for 

 divers, both for safety and for search/location/rescue. 



Development of a light-weight, reasonable endurance, cheap diver transport 

 vehicle. 



Development of improved handling systems for divers, diving systems, equip- 

 ment, submersibles, habitats, etc. through the air/sea interface in weather up to sea 

 state 5/6 or higher. 

 "Study and analysis of diver accidents and existing safety regulations, with a view 

 to developing better regulations, codes of practice, training standards and methods. 



42 



