Special Instructions

Various special instructions the observer may use in attack of the target are discussed below.

• Interval. This is used to cause FFE rounds to be fired with a specific time interval between each salvo. The observer announces INTERVAL followed by a desired time interval (seconds understood); for example, 10 SALVOS, INTERVAL 30, FIRE FOR EFFECT.



• Sustained Fire. If there is a requirement for fire for effect to be spread over a specific period of time, the observer may specify SUSTAINED FIRE. The command includes the number of salvos and the period of time in which they are required to be fired; for example, 20 SALVOS, SUSTAINED FIRE, 5 MINUTES, FIRE FOR EFFECT.



• Time on Target. The observer may require the initial salvos in fire for effect to impact on the target at a specified time.




• Continuous Illumination. The observer may require constant light on a target. He may specify a period of time the illumination is to be effective. The ship determines the interval to fire the subsequent illumination salvos based on the burning time of the projectile.