Section 5

Question 1

Minimum surface interval

Answer 1

When you want a specific time and depth for repetitive dive

Question 2

Finding surface interval time

Answer 2

1. Wait and check
2. Use dive computer plan mode
3. Use tables or app

Question 3

Flying after diving

Answer 3

Single dive - 12 hr surface interval before flying

Repetitive dive or multi day - min 18th hr wait pre flight

Question 4

Narcosis

Answer 4

Usually starts at 30 meters

Cool water. Low viz and darkness can make it worse

Thought to be caused by undissolved gases