[MITgcm-support] difference between writeStatePrec and writeBinaryPrec

[David Hebert]

What is the difference between writeStatePrec and writeBinaryPrec? From 
search of MITgcm web it looks like writeBinaryPrec gets set to 
writeStatePrec.

I am interested in writing double precision pickup files, but single 
precision dumps for storage. It this possible, and what flags are set to 
do this?

Thanks,

David