On Opportunity Fire

Below is the rules from Battleground WWII as pertains to Opportunity Fire. Based on them, before a character goes on Op-Fire, they must meet the following criteria:

• They are armed with a ranged weapon and are prepared to fire it
• They cannot, at the time of announcement, have line of sight on any enemy targets
• They forego any actions in the round of announcement of op-fire, and any subsequent rounds in which they remain on op-fire.
• The op-fire action is a standard action.