Whistles

Whistles are objects handed out by the Delver Guild HQ, in Orth, to indicate a Delver's rank and the tasks one is allowed to take on.

Whistles from lowest to highest rank
''This article is about the object. For the delver rank, see Bell (rank).'' Bells are objects that indicate the delver rank of its owner as novice studying to become a Delver.

''This article is about the object. For the delver rank, see Red Whistle (rank).''

Red Whistles are objects that indicate the delver rank of its owner as an apprentice Delver.

''This article is about the object. For the delver rank, see Blue Whistle (rank).''

Blue Whistles are objects that indicate the delver rank of its owner as a more experienced Delver.

''This article is about the object. For the delver rank, see Moon Whistle (rank).''

Moon Whistles are objects that indicate the delver rank of its owner as a highly proficient Delver.

''This article is about the object. For the delver rank, see Black Whistle (rank).''

Black Whistles are objects that indicate the delver rank of its owner as an expert Delver.

For the delver rank, see White Whistle (rank) and for more information on the Artifact, please see White Whistle.

Trivia

 * The colors for the whistle's and ranks were decided by the colors of the night sky. That is why they go from red, blue, moon etc. Red Whistles were made red so it would be easier to pick them out as beginners as the color is not associated with the night sky but more with early morning. The White Whistles are special because they are not part of the night sky theme.
 * According to Riko, whistles used to be made out of cork but, since cork whistles had problems making sounds at stable volumes when wet, they were eventually replaced with their current, improved designs.