The sea pressure (also referred to as hydrostatic pressure) is simply the difference between pressure measured underwater and atmospheric pressure.

Using the example of an RBRconcerto C.T.D, for this derived channel:

• n0 is the index of the pressure channel, 3 in this case
• n1 is the index of the atmospheric pressure channel; not present in this example, so set to "value".

Example commands:

( Confirm the channel type )

( Request confirmation of everything )