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GAME PHASES: They are all identical each turn, except when mandated by special case (for instance the surprise attack phase of December 1941 in FC Pacific). In sequence:

• Arrival of reinforcements in a friendly port, or removal of units if required by date/turn.
• Moving Patrols out to sea, to take control of the sea areas.
• Placement of land-based aircrafts, one plane at a time, sides alternating. Only in allowed seas. Those planes can control sea zones.
• Movement of amphibious units.
• Placement of the submarine unit (if in game).
• Raid Missions with the aim of making attacks or defenses in sea areas, but not allowance future control by raiding ships.
• Resolution of naval battles, in the order selected by the Japanese player, sea area by sea area. Battle sequence is described hereafter.
• Landing of Marines, if they did not take place during battles.
• Return to port of all Raid Missions.
• Check of sea areas control and change of ownership of isolated bases.
• Return to base of land-based aircrafts and return to port for all patrolling ships.
• Repair of damaged units in ports.

BATTLE PHASES: Each battle follows the same process below, for as long as units of both sides remain in the currently selected sea area:

• Selection of battle round type, between air and surface. Should the sides disagree, a random selection is made, with various bonus or penalties for air action, area control or admiral’s presence in the sea area.
• Exchange of fire, air or surface, are simultaneous, although show one side after the other for better presentation aspect and understanding. All units allowed to fire may select only one single valid target per round. This full exchange is one round of battle, and it can be repeated until combat is over.
• Some ships cannot be targeted in surface battles if protected by screen of other ships and not engaged themselves (this restriction does not apply to air combat).
• Both sides may retreat totally or in part at the end of a battle round. If both remain, another round starts anew.
• Ships and planes suffer disable results or damages points. Accumulated damage superior to the ships’ protection factor sinks them. In ports (via air raids), ships can take double damage before sinking, but stay on the bottom and can’t move (till repaired) if damage exceeds protection.
• In case of a retreat, unit can be pursued by non-retreating opponents if the respective ships speeds allow.
• Retreats are made toward bases in the same area, or closest major port.
• At the end of the battle, victorious side with aircraft carrier may launch 2 rounds of air raids over bases adjacent to the sea area.
• During the battle, a maximum of one submarine per side, if present, may fire once. In such a case it will return to base just like a raiding ship.

MOVEMENT OF SHIPS: Depending on their missions (patrol or raid) and their speed. On patrol, a ship may move to an adjacent sea and, possibly, one sea further on if speed allows. Most fast ships will automatically succeed, whi