On the foremast.

The jib sail is the triangular staysail in front of the foremast. Sometimes a spinnaker replaces the jib. They are both generally referred to as "headsails".

The number three jib is the smallest of three headsails on a sailboat and it is sometimes called a storm jib, because it is the one most likely used during storm conditions.

If a boat has more than three headsails, the number three sail would be smaller than number two, but may not be the smallest headsail on the boat. For example if a boat has four jibs, say a 170, a 150, a 110 and a storm jib, then the 110 would be considered the number 3 jib and the storm jib would be number 4.

On a typical sloop etc the headsails are controlled by winches,one to port and one to starboard. The mainsail is usually controlled by a rope block system attached to the boom

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern -E---AIL-. That is, nine letter words with 2nd letter E and 6th letter A and 7th letter I and 8th letter L. In alphabetical order, they are:

headrails

headsails

reassails