DIFFICULTIES of underwater tools:
1) Water resistance
2) Equipment bulk weight.
3) Visibility limitations.
4) Buoyancy.
5) Leverage.
6) Inability to achieve suitable body position.
7) Water temperature affects manual dexterity.
8) Currents and tides.
ADVANTAGES of underwater tools:
1) Reduces physical exertion.
2) Faster.
3) Increases diver’s working capabilities.
4) Increases number of waterborne tasks divers can accomplish.
5) Reduces number of divers required in the water.
DISADVANTAGES of underwater tools:
1) Requires additional support personnel.
2) Large support craft.
3) Extensive maintenance.
4) Limited diver mobility.