Question: Are simultaneous dives different or the same?
About the article "Diving", section "Synchronized diving".

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Altitude diving is underwater diving using scuba or surface supplied diving equipment where the surface is 300 meters (1,000 feet) or more above sea level (for example, a mountain lake).
The U.S. Navy tables recommend that no alteration be made for dives at altitudes lower than 91 meters (300 feet) and dives between 91 meters and 300 meters correction is required for dives over 44 meters sea water (145 feet sea water).
Altitude diving is significant in recreational diving because the depths and durations used for dives at altitude are different from those used for the same dive profile at sea level. 
Maldives offer different typology of dives but quite all the dives are characterised by medium to strong currents, that's actually what makes them so rich of life. 
  Divers perform 4 dives from a height ranging from 26-28m.
There are a total of nine groups (front, back, reverse, inward, front twists, back twists, reverse twists, inward twists and all armstand dives).
The two required dives must be performed from different take-off positions.
There are 5 take-off positions (front, back, reverse, inward and armstand).
The degree of difficulty for each required dive is 3.6.
To clarify: front double half twist and front double 1½ twist are different groups, but the same take-off position.
If a dive has less degree of difficulty, it will still be 3.6.
The two optional dives must be from different groups from the 9 groups mentioned above.
In addition, the optional dives must be done in alternating order every competition.
A list of dives for each diver shall consist of two required dives of a fixed degree of difficulty for every athlete (3.6), and two optional dives assigned a degree of difficulty computed from the 2010 HDA table.
The first required dive will be done after a short warm-up on the second training day.
This is already part of the competition and will count 100 percent towards the total score.
After this first round of dives, training can resume.
The next day will have a short warm-up period followed by 2 dives (one required, one optional dive) in head-to-head format.
The final dive will be done by the top 8 divers (winners head-to-head plus one lucky loser) in reverse order according to their cumulative score from the first 3 dives.
Balks will receive a 2-point deduction from each judge for the first balk.
Another 2-point deduction for the second balk and be considered a failed dive on the third balk.
A balk is considered an interruption in movement after the diver does his press immediately before the dive.
For armstand dives it is the point when both feet leave the platform (use FINA definitions).
Running take-offs on forward dive groups (including twists) are allowed, given there is enough space for the approach.
If the diver enters the water with his hands up on a feet-first entry, he can only get a maximum score of 5 points from each judge.
The 5 points would mean a perfect execution of the entire dive with the exception of the arms.
If arms are at or below shoulder height but not in alignment with the body (straight arms either in front or on the side of the body), judges can deduct between ½ to 2 points at their discretion according to the degree of the mistake.
A break in position at or just before entry can have a deduction of ½ to 2 points at the judges' discretion.
An intermediate break of position can receive no more than 4.5 points from each judge.
If a dive is done in a completely different position than announced: for example back triple tuck instead of back triple pike, the dive can only receive a maximum of 2 points.
All dives submitted in a list must consist of at least 180 degrees of rotation around a horizontal axis.  
Simultaneous games are games where both players move simultaneously, or if they do not move simultaneously, the later players are unaware of the earlier players' actions (making them "effectively" simultaneous).
Sequential games (or dynamic games) are games where later players have some knowledge about earlier actions.
This need not be perfect information about every action of earlier players; it might be very little knowledge.
For instance, a player may know that an earlier player did not perform one particular action, while he does not know which of the other available actions the first player actually performed.
The difference between simultaneous and sequential games is captured in the different representations discussed above.
Often, normal form is used to represent simultaneous games, and extensive form is used to represent sequential ones.
The transformation of extensive to normal form is one way, meaning that multiple extensive form games correspond to the same normal form.
Consequently, notions of equilibrium for simultaneous games are insufficient for reasoning about sequential games; see subgame perfection.
In short, the differences between sequential and simultaneous games are as follows: 
The Dives is a 105 km long river in the Pays d'Auge, Normandie, France.
It flows into the English Channel in Cabourg.
The source of the Dives is near Exmes, in the Orne department.
The Dives flows generally north through the following departments and towns: Orne: Trun Calvados: Morteaux-Coulibœuf, Saint-Pierre-sur-Dives, Troarn, Dives-sur-Mer, Cabourg The Dives is officially navigable up to the bridge at Putot-en-Auge although height restrictions apply.
No yachts or fishing boats navigate the Dives further than the Pont de la Dives linking Dives-sur-Mer to Cabourg, 1 km from the river's estuary on the English Channel.
The last kilometre of the Dives is a large meander encircling a man-made harbour and the holiday resort of Port Guillaume (William's harbour).
The river is prevented from reaching the English Channel by a kilometre long sand dune called "Le cap Cabourg".
The estuary of the Dives was the site of one of William the Conqueror's most decisive victories in the year 1057, over the combined armies of France and Anjou.
Later, in 1066, Duke William assembled his army and fleet for the invasion of England at the same location as the earlier victory.