floating point numbers in Lucid Lisp on the Apollo

[Jeffrey P. Golden <jpg@ALLEGHENY.SCRC.Symbolics.COM>]

The DOMAIN/CommonLISP Reference Manual p.12-6 says:
"Common Lisp designates four floating-point number formats: 
short-float, single-float, double-float, and long-float.  ...
DOMAIN/CommonLISP represents all four types of floating-point 
numbers in the single-float format."  I had previously 
discovered this for myself.

I expect some Apollo machines have double-floats.  True?
So, I guess this just means that Lucid has decided not to give 
its users access to Apollo double-floats at this time?

Can anyone clarify this?