use  Geography::NationalGrid;

##</code><code>##

$ perl -MGeography::NationalGrid::IE -we1
Can't locate object method "deg2rad" via package "Geography::NationalGrid" at /opt/perl/lib/site_perl/5.12.2/Geography/NationalGrid/IE.pm line 7.
BEGIN failed--compilation aborted at /opt/perl/lib/site_perl/5.12.2/Geography/NationalGrid/IE.pm line 7.
Compilation failed in require.
BEGIN failed--compilation aborted.
$
$ perl -MGeography::NationalGrid -we1
$