What does 'Weapons Tight' require from personnel?

The term 'Weapons Tight' requires personnel to fire only at targets that have been positively identified as hostile. This level of engagement is implemented to prevent fratricide (friendly fire incidents) and to ensure that personnel are engaging only legitimate threats. The emphasis on positive identification is crucial in combat situations where the risk of hitting non-combatants or friendly forces is high.

In contrast, the other options do not reflect the prudence exercised under 'Weapons Tight' conditions. The first choice of firing at unidentified targets poses a significant risk of collateral damage, as it does not distinguish between friend and foe. The suggestion to commence fire at any time also breaches the guidelines meant to maintain operational discipline and minimize unnecessary engagements. Finally, engaging only under direct command would imply a restrictive engagement stance, but that does not convey the need for positive target identification required in 'Weapons Tight' scenarios.