Channel Aliasing
----------------
If comparing series it will be found that sometimes channels that can be thought
of as belonging to the same parameter do not have the same name. The
channel aliasing option gets round this problem by specifying  a mapping
within the driver file.

The syntax is as follows:
   %c chan1 chan2   ....  >  chanot

The percent sign should appear in the first column. More than one
line is allowed -  up to a limit of 200 channels. The aliasing has immediate
effect and can be placed anywhere in the driver file.


Implicit Channel Aliasing
-------------------------
Implicit aliasing permits the use of Edserplo without
recourse to standard parameter names. Thus for example
ADCP data is recognised as such by the appearance of
a zero-rank DBIN parameter within the series. If you had 
a series which used a different parameter (e.g.DEPBIN) the
inclusion of the line  

  %vd0 DEPBIN

within the driver file implicitly maps DEPBIN to DBIN so that
the series is recognised as an ADCP series (assuming time is also
present). The number identifies the rank expected. 

Equally if you want to take advantage of the inset track facility
you could for example use

    %va1 latd
    %vo1 lond

assuming that 'latd' and 'lond' are the channels defining ship
position. OSCR positional information is specified similarly

    %va0 cellat
    %vo0 cellon