What is included in the composition of an umbilical?

The composition of an umbilical in diving systems is a critical aspect as it ensures the diver is provided with all necessary support during underwater operations. An umbilical typically includes various components that each serve a specific purpose essential for the safety and efficiency of diving.

One component is the breathing gas hose, which is crucial for delivering breathable air to the diver from the surface. The specification of a minimum 3/8 inch inner diameter (I.D.) for this hose is important as it allows for sufficient airflow while maintaining manageable flexibility for the diver.

Additionally, a pneumofathometer hose is included, which serves to transmit pressure readings from the underwater environment back to the surface. A 1 1/4 inch I.D. for this hose ensures that pressure changes can be transmitted effectively without any significant loss of signal integrity.

Moreover, an umbilical must also include communication (comm) cables and strength (str) cables. The communication cables enable voice communication between the diver and surface support teams, which is vital for coordination and safety. The strength cables are included as a safety feature, providing additional support to the diver and helping to manage the umbilical’s weight and flexibility underwater.

By incorporating all these components, the umbilical ensures that