maximum depression

maximum depression

[′mak·sə·məm di′presh·ən]
(ordnance)
The maximum vertical angle below the horizontal plane at which a piece of artillery can be laid and still deliver effective fire.
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References in periodicals archive ?
Onset time was the interval from the injection of the vecuronium to the maximum depression of T1.
The following parameters were measured or calculated: lag time (seconds) = time interval from the injection of the vecuronium to the beginning of depression of T1; onset time (seconds) =time interval from the injection of the vecuronium to the maximum depression of T1; DUR25% (clinical duration in minutes) = time interval from the first injection of the vecuronium to spontaneous recovery of T1 to 25% of the control value; DUR25-75 (recovery index in minutes)=after the last dose of the vecuronium, the time interval from 25% to 75% recovery of T1; and DUR25-TOF 90 (minutes) =complete recovery of neuromuscular function, namely the time interval from recovery of T1 to 25% of the control value to a TOF ratio of 0.
That puts it right smack in the way of the recoil path of the main gun when it's fired at maximum depression.

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