Air Diving

Question 1

What is the minimum size crew required for air diving ops

Answer 1

5 
1x supervisor 
1x diver 
1x stby
2x tenders

Question 2

Dive stage bottles should be equipped with a first stage regulator going to a double connection with what items on each side

Answer 2

One side should contain a demand valve.

The other side should go to an obvious valve connected to a rigid hose that can be pushed inside the helmet

Question 3

What are the minimum gas quantities for air diving operations?

Answer 3

• Sufficient compressed gas for 2 emergency dives to the full intended depth as reserve.
• sufficient compressed air to pressure both locks of the ddc to maximum treatment depth (50msw) plus sufficient air for 3 complete decompression cycles
• this air must be stored in containers or else be supplied by 2 totally independent dedicated sources.
• 90m3 (3200ft3) of medical quality oxygen for emergency treatment procedures

Question 4

When diving using ladders for access to the water, how far below surface should it extend and what is the max climb above the water line.

Answer 4

2. 0m below the waterline

2. 0m max above waterline

Question 5

Scuba is an acceptable method of diving offshore

True or False

Answer 5

False

Question 6

What is the minimum number of personnel required in mix gas diving?

Answer 6

6

Question 7

Who must be in possession of the dive plan before the dive begins?

Answer 7

Diving supervisor

Question 8

When 2 diving companies are on the same job, the company in overall control is referred to as;

Answer 8

The diving contractor

Question 9

How much OBG is required for surface mixed gas diving?

Bottom mix and Air

Answer 9

7m3 of each gas per diver

Question 10

During surface mixed gas diving, bailouts usually contain what mix?

Answer 10

Bottom mix