1. A given volume of gas will explode on ascent from:
A: 30m
B: 20m
C: 10m
D: 40m
E: 50m
2. One of the problems associated with negative buoyancy is:
A: hitting the whale above you
B: being bitten by a shark
C: riding a dolphin
D: squashing a squid
E: all of the above
