[center][h2]Whistles of the abyss[/h2][/center]

Delvers are classified with whistles of different colors, based on their ability, experience and achievements. Everyone on the island that is a delver has such a whistle. Only when you become a red whistle you will be allowed to enter the abyss by the guards.

[b]Bells[/b]
Bells are the novices. Not a whistle at all. Given to those who are studying to become delvers, but have yet to actually go into the abyss themselves. Though most bells are given to young children, when Reg first arrived at Belchero Orphanage he was also given a bell until his first dive.

[b]Red Whistles[/b]
Red Whistles are the apprentices. They are rookie delvers who have a decent knowledge of the abyss and have descended up to the first layer on their own. It is a common rank for prepubescent kids who have studied since an early age. One obtains a red whistle and the official title of delver after their first descent into the abyss. While they're fairly knowledgeable, red whistles lack the physical fortitude to get very deep, so they're only allowed to descend up to 550 meters. Going any deeper would be treated as an accident or a rebellious behavior, and a rescue party would be sent to retrieve them. If a red whistle somehow managed to descend 1350 meters, it is treated as suicide and search parties are called off.

[b]Blue Whistles[/b]
Blue Whistles are the adepts. They are more experienced delvers who managed to prove themselves. Blue whistles are allowed to delve up to the second layer of the abyss, so they most likely possess an acceptable fighting ability to fend off the beasts of the forest of temptation. Typically and with the appropriate training, one attains the rank of blue whistle at the age of 15, though there are exceptions to this.

[b]Moon Whistles[/b]
Moon Whistles are the teachers. They are highly proficient delvers that carry an extensive knowledge of the abyss. Moon Whistles can delve up to the third layer safely, so their delving ability is in a completely different level to Blue Whistles. They're considered experienced enough to serve as teachers for the newer generations.

[b]Black Whistles[/b]
Black Whistles are the experts. They are extremely talented delvers that have mastered the techniques of delvers. Black Whistles can reach up to the fourth layer of the abyss, which is the point in which the strains of ascension can really make one touch insanity. They also sometimes work under white whistles as subordinates, and assist them in their expeditions.

[b]White Whistles[/b]
White Whistles are the legends. They are considered to be the greatest delvers of all. Their achievements have changed the world and their discoveries astonished all, turning them into spectacular historical figures. White whistles are named after their unique persona and reach a whole new level incomparable to that of other delvers. They're armed to the teeth with artifacts of the abyss, and represent a formidable force. Because of their status, any information that is officially passed by them is considered a fact, no matter how absurd.

White Whistles don't have any depth limit, however since the strains of ascension make it humanly impossible to survive the ascent from the 6th layer, for most of their life the 5th layer is their limit. At some point when they make the decision, a white whistle will descend to the inviolable 6th layer. Since return from this point is impossible, this descent is called the Last Dive and it represents the most important point of their career, delving into largely unknown territory.