Trimix
This enables divers to operate at much deeper depths than divers using air. A trimix is made by blending Helium, Oxygen and air resulting in a mix of Helium, Oxygen and Nitrogen. The gas is blended for the working depth of the dive, different depths require different mixes. The gas, once blended takes 12 hours to homogonise or mix properly so needs to be prepared a day before it is required by the divers. Accurate analysis of Helium, Oxygen and Nitrogen content in each set of tanks is essential for diver safety and correct dive planning. The extra cost of Helium gas for these mixes is outweighed by the benefits afforded to deep water operations.
Extreme Depths
Divers can operate at depths down to 130m, the limit of the insurance cover. Dives deeper than this can be made if dive individual dive plans are submitted to the insurance company and approved. Also the local recompression chamber needs to be officially on stand by. For all practical purposes without a diving bell and surface supply 120m is the working limit. The helium in the gas has the benefits of clear thinking for the divers, no narcotic effect, thus insuring correct decisions are made and correct observations are recorded. Also as the gas is thinner it allows the diver to breathe more efficiently when working at depth. The reduced Oxygen in the mix allows the diver to exceed air depths without the risk of convulsions underwater.
Dive Planning
Safe planning for our dives is carried out in advance using decompression software which allowing optimum plans to be made for each dive required to complete a project. The software is a proven model for deep diving and updated on a regular basis.
