Properly "Screwed" Pun Intended.

The pun of properly screwed in this particular instance is the word properly, because we are talking about the noun "Screw". A screw as a noun is not only a small metal pointed holding device with threads, that has a slot, phillips, robertson, allen, or other head on it, a screw is also what the "drive" or propeller is called on a vessel of a boat or ship.

Here is a diagram of an early screw or propeller, credits to Wikipedia.

http://upload.wikimedia.org/wikipedia/en/a/a8/F._P._Smith%27s_original_1836_screw_propeller_patent.jpg



You can see how this propeller resembles the threads on a screw.



Back to the pun of properly screwed. The pun is PROPerly screwed, as in the Prop of

a propeller when referring to a boat screw.



Often when boating enthusiasts are talking about boats they will say, "one screw or two screws", which means, does it have one or two propellers.



When using old MapQuest or new MapQuest you will always know where you are, and you will not be "propellered".