Red Sea Weapon Expenditure

The War Zone website has an article offering the first glimpse into weapon expenditures in the Red Sea against the Houthis.  As stated by head of Naval Surface Forces, Vice Adm. Brendan McLane, here are the weapon expenditures:
 

• 120 SM-2 missiles
• 80 SM-6 missiles
• 20 Evolved Sea Sparrow Missiles (ESSM) and SM-3 missiles (combined, for some unknown reason)
• 160 rounds from five-inch guns

 
Total = 220 missiles
Total = 160 shells
 
CIWS was not mentioned although at least one example of CIWS use has been documented and acknowledged by the Navy.
 
Against this expenditure, the Admiral claims “more than 400” targets were engaged.
 
 
Elementary arithmetic shows that if the Navy’s 380 total munitions fired destroyed “more than 400 targets”, that’s a kill ratio (pK) of greater than 1.0 !!!!!  In other words, every Navy munition killed its target and many killed more than one target.  That’s amazing.  That’s incredible.  That’s unbelievable.  No, seriously, that’s not believable.  In fact, it’s blatantly wrong.
 
The admiral continues his unbelievable statements with,
 

“We’ve done the analysis with what we used to shoot in World War II, and we’re at about two rounds per incoming missile,” McLane said.[1]

We didn’t engage missiles in WWII so I have no idea what he’s talking about.  Aerial targets in WWII required thousands of rounds per hit so, again, I have no idea what he’s referring to.
 
Further, the good admiral undoubtedly is not including 5” shells in his statement of analysis as 5” guns have a near-zero chance of hitting a missile.  So, subtracting out the 5” shells, that means the Navy’s 220 missiles destroyed more than 400 targets for a pK of 1.8 or almost two targets destroyed by each defensive missile fired.  That’s just totally absurd, of course.
 
Setting all that aside, the admiral claims that two ‘rounds’ (which I assume to mean missiles) were used per engagement which would conform to the Navy’s standard ‘shoot, shoot, look’ tactic.  That means that the 220 missiles could have engaged only a maximum of 110 targets not more than 400.  That also assumes that every engagement worked and that would so greatly fly in the face of all historical defensive missile performance as to be flat out unbelievable.  The pK’s throughout history have been uniformly in the 0.01-0.25 range not 1.0-2.0.
 
Now, to be fair, the admiral wasn’t offering a detailed engagement analysis;  he was just providing weapon expenditures and likely threw out a ballpark number of targets just to provide context.  I don’t think he was lying or even being intentionally misleading.
 
I can readily imagine that some of the 400 targets were engaged by aircraft whose weapons (Sidewinders, presumably) weren’t included in the Navy’s ship weapons expenditure although that would mean that even fewer targets were actually engaged by ship missiles and that would significantly lower the pK.
 
We know that 5” guns are notoriously inaccurate (recall the Vincennes incident where some one hundred rounds were fired with zero hits) so the 160 shells fired were probably directed at just a few targets.
 
Clearly, this scant bit of information the admiral provided is not useful in analyzing weapon performance, only total expenditure and even that has gaps in the information since Sidewinders, CIWS, and RAM, among others, were not mentioned.  While the presumed pathetically poor quality and performance of the attacking missiles would result in better pK’s than historically found, I’m certain that the pK is nowhere near 1.0 and, indeed, the admiral’s own claim of two rounds per engagement disproves the apparent pK.  Unfortunately, until the Navy provides some detailed performance data, we can only speculate.
 
The only valid conclusion from the admiral’s statements is that we are on the wrong side of the cost curve … big time!  We’re using $2M-$4M missiles (two at a time!) to shoot down thousand dollar drones and cheap missiles.
 
This simply reinforces the common sense conclusion that you deal with attacks not by defending but by destroying the source of the attacks.  Perhaps the new administration will take a different view of the Red Sea actions than the previous administration.  We’ll have to wait and see and, in the meantime, we’ll continue to bleed money, deplete our missile inventories, and risk our ships while waiting for the inevitable leaker that gets through.
 
 
 
____________________________

 
[1]The War Zone website, “Navy Just Revealed Tally Of Surface-To-Air Missiles Fired In Ongoing Red Sea Fight”, Geoff Ziezulewicz, 14-Jan-2025,
https://www.twz.com/news-features/navy-just-disclosed-how-many-of-each-of-its-surface-to-air-missiles-it-fired-during-red-sea-fight