D 1.1 These Rules shall govern all Diving competitions covered by BL 8 and GR 9 (Olympic Games and World Championships), BL 9 (World Diving Cup), and GR 10 (World Junior Championships).
D 1.2 All diving installations, including the springboards and platforms, shall be in accordance with the FINA Facilities Rules, inspected and approved by the delegate of FINA, and a member of the Technical Diving Committee no later than 120 days prior to the start of the competitions.
D 1.3 When diving is sharing the same venue with any other discipline, all diving installations shall be available for use by entered diving competitors on competition days provided no competition is in progress.
D 1.4 Divers younger than 14 years on December 31st in the year of the competition shall not be permitted to compete at the Olympic Games, World Championships, or World Cups.
D 1.5 Diving Number Designations
D 1.5.1 All dives shall be designated by a system of 3 or 4 numerals followed by a single letter.
D 1.5.2 The first digit shall indicate the group to which the dive belongs:
1 = Front
2 = Back
3 = Reverse
4 = Inward
5 = Twisting
6 = Armstand
D 1.5.3 In the Front, Back, Reverse, and Inward groups, a 1 in the second digit indicates that the dive has a flying action during the dive. When there is no flying action the second digit shall be 0.
D 1.5.4 The third digit shall indicate the number of half somersaults being performed. For example 1 = ? somersault, 3 = 1? somersaults etc.
D 1.5.5 In Armstand dives the second digit indicates the group or direction to which the dive belongs:
1 = Front
2 = Back
3 = Reverse
D 1.5.6 In the Twisting group (those dives beginning with the digit 5) the second digit indicates the group or direction of the take-off as listed in D 1.5.2 above.
D 1.5.7 In the Twisting and Armstand groups the fourth digit shall indicate the number of half twists being performed.
D 1.5.8 The letter at the end of the dive number shall indicate the position in which the dive is performed:
A = Straight
B = Pike
C = Tuck
D = Free
D 1.5.9 Free position means any combination of the other positions and is restricted in its use in some twisting dives.
D 1.6 Degree of Difficulty
D 1.6.1 The degree of difficulty of each dive is calculated using the following formula (the component values of the formula are outlined in Appendix 1):
A + B + C + D + E = DEGREE OF DIFFICULTY
D 1.6.2 As a guide, dives with their numbers and degrees of difficulty have been calculated and are tabled in Appendix 2.
D 1.6.3 Any dive, which is not tabled in Appendix 2 but is used in a competition, shall be given the dive number and degree of difficulty as determined in accordance with Rules D 1.5 and D 1.6.
D 1.6.4 In calculating the degree of difficulty for dives with twists, the following need do be noted:
• Dives with ? somersault and twists can only be executed in position A, B, or C,
• Dives with 1 or 1 ? somersaults and twists can only be executed in position D,
• Dives with 2 or more somersaults and twists can only be executed in position B or C, and
• Armstand dives with 1, 1 ?, or 2 somersaults and one or more twists can only be executed in position D.