14-1 INTRODUCTION

INTRODUCTION

Purpose

The purpose of this chapter is to familiarize divers with U.S. Navy surface-supplied procedures.

Scope

Surface-supplied mixed-gas diving is conducted with helium-oxygen mixtures supplied from the surface by a flexible hose. Surface-supplied mixed-gas diving is particularly suited for operations beyond the depth limits of air diving, yet short of the depths and times requiring the use of a deep diving system. Surface-supplied mixed-gas diving is also useful in the deep air diving range when freedom from nitrogen narcosis is required.

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