END {scuba}

Equivalent Air Depth

Description

Computes the Equivalent Narcotic Depth for a Trimix mixture at given depth.

Usage

 END(depth, g)

Arguments

depth

depth of dive, in metres. A numeric value or a vector of values.

g

The breathing gas. An object of class "gas".

Details

Applies the standard formula for equivalent narcotic depth: the depth at which compressed air would have the same partial pressure of narcotic gases as the specified gas g at the specified depth (assuming that both Nitrogen and Oxygen are narcotic).

Value

Numeric value or vector giving the Equivalent Narcotic Depth in metres for each value of depth.

Warnings

This function does not check whether the breathing gas would be safe (it could be hypoxic or toxic at the depth in question). It is not applicable to altitude dives.

Author(s)

Adrian Baddeley [e-mail].

See Also

ead

Examples

  # Trimix 18/50
  #            (18% oxygen, 50% helium) 
  END(30, trimix(0.18, 0.5))