{"general_knowledge":"Whistles are the primary method of indicating a Delver's rank, skill, and permitted depth within the Abyss. They are worn around the neck and are strictly regulated by the Delver's Guild. They act as mundane whistles, with the exception of White Whistles which are Grade 2 relics.","ranks":[{"id":"whistle-bell","color":"Bell","rank_name":"Novice","depth_limit":"Surface (Not allowed in the Abyss)","description":"Bells are given to young children (typically under 9) or recent recruits who are novices studying to become delvers. They are not permitted to enter the Abyss; the bells help people know where these young children are.","requirements":"Enrolling in a Delver training program, such as the Belchero Orphanage."},{"id":"whistle-red","color":"Red","rank_name":"Apprentice","depth_limit":"1st Layer (up to 1,350m)","description":"Red Whistles are apprentice delvers, typically 14 years old or younger. Their exploration is usually restricted to the very upper levels of the first layer (first few hundred meters). They delve in large groups for safety, usually supervised by a Moon or Blue whistle.","requirements":"Basic training. Often held by orphans in training."},{"id":"whistle-blue","color":"Blue","rank_name":"Adept","depth_limit":"2nd Layer (up to 2,600m)","description":"Blue Whistles are experienced delvers, aged 15 or older. They are capable of handling the dangers of the Forest of Temptation and often act as guides or assistants to Moon whistles in the first layer.","requirements":"Reaching 15 years of age and demonstrating significant skill and experience as a Red Whistle."},{"id":"whistle-moon","color":"Purple","rank_name":"Teacher / Moon Whistle","depth_limit":"4th Layer (up to 12,000m)","description":"Moon Whistles (which are purple in color) are highly proficient delvers who often serve as trainers or teachers for lower ranking whistles. They frequently guide groups of Red Whistles in the upper layers.","requirements":"Extensive experience, deep knowledge of the Abyss, and proven ability to instruct others."},{"id":"whistle-black","color":"Black","rank_name":"Expert","depth_limit":"5th Layer (up to 13,000m)","description":"Black Whistles are elite delvers, masters of survival who can navigate the extreme dangers of the upper 5 layers. They perform difficult and valuable expeditions or recovery missions in search of high-grade relics.","requirements":"Exceptional skill, numerous successful deep descents, and significant contributions to the Guild."},{"id":"whistle-white","color":"White","rank_name":"Legend (Sovereign)","depth_limit":"No Limit (6th Layer and beyond)","description":"White Whistles, or Sovereigns, are the absolute pinnacle of delvers. The whistles themselves are unique Grade 2 relics that can only be used by their original owners. They are the only ones permitted to dive into the 6th layer (the 'Last Dive').","requirements":"Requires a profound discovery, unparalleled skill, and the possession of a Life Reverberating Stone (a unique relic formed from a human sacrifice) to act as their whistle."}]}