Colorado Goldfields Inc. (fka CGFI)

[M_T_Pockets]

Good question, jd4!
Here is a semi quick answer.
In navies, water carried on ships had a tendency to go bad. Some boats carried light alcohol beer for the sailors to drink. Even that went bad. So it started out as "near beer" (3.2% alcohol) mixed with rum. In the British navy it was rum mixed with water to help the taste of the water that was stored on the boat. (Pretty fowl tasting stuff, that water!) They also added lemons and limes to the water rum mixture to help the taste.(Thus the referral to British sailors as "limeys")
In the US navy, they used rye whiskey instead of rum. That went on till around WWI. (longer in the British navy)

Nowadays Grog is any simple mixture of two ingredients, one alcoholic, the other could be anything alcoholic or not.
So, a Screwdriver would qualify, or a Boilermaker, or Jack Daniels & 7, Rum & Coke, etc.

Here is a link to the wiki definition:
http://en.m.wikipedia.org/wiki/Grog

Here on the CGFIA board it is just a running joke we like to throw around!(Sort of like the Flotilla & Armada stuff) It does break up the seriousness at times.

So, when the sun is over the yardarm ( a measure of time in the navy) get yourself a refreshing Grog and call it a day! It helps you keep your sanity on some of the days we have had here lately!

Gentlemen & Ladies, A toast, to God & Country! (and CGFIA, too)
Cheers!