to Vaaish
proposed change add a possibility to issue BFI as standard special order. I suppose it has nothing to do with normal way of issuing this order (during opponent turn for example), even if some special order (including BFI) was failed at at begining of the ship's turn. In fact it adds a new "Fleet level BFI" order wich is issued by admiral and as such follows the regular rules for SO.
But, again, for good or evil, it is a MAJOR balance change favoring various attack run tactics.
To make it absolutely clear.
this change brings the following:
you can BFI
A) voluntary at the beginning of your turn (count as normal SO. duration: current turn and the following enemy turn)
B) Ordanance or movement phase, ship under fire (duration: the remainder of the current turn, following enemy turn and, next turn of the vessel)
C) During enemy turn, ship under fire (duration: enemy turn and next turn of the vessel)
variant (A) brings the possibility to issue an order in the beginning of your turn before enemy ships will commence heavy fire (during their turn), survive it being on BFI, and then engage at full power. So you can issue BFI in advance for ships which probably will come under fire in an opponent following turn, and then retaliate in strength, while normal course of events is: come under fire - BFI - next turn firepower reduced.