NBCI--another threat to operational effectiveness?

Battle casualties are well recognised as a threat to Operational Effectiveness (OE) at times of conflict. Less well appreciated is that naturally occurring illnesses and injuries--Non-Battle Casualties and Injuries (NBCI)--continue to present at such times and will add to the problems of fighting the ship. This prospective study showed that NBCI resulted in a total of 1369 man days of lost personnel effectiveness among some 1738 RN servicemen during a 180 day deployment. That is just 0.42% of the possible man working days. This represents a loss of 4.3 man days per 1000 at risk per day in terms of fitness for Full Duties or 2.74/1000/day excluding those able to perform Light Duties. It is unlikely that such rates would affect the OE of the fighting units but they do represent a significant challenge to the Royal Naval Medical Service to continue to maintain the rates at such low levels, so that when aggregated to the numbers of battle casualties, OE is maintained as far as possible.