One of the common
suggestions that I encounter is the need for a sea control ship. This is one of those concepts whose
definition, and therefore capabilities and requirements, depends on the person
bringing it up. Everyone seems to have a
different definition.
The original sea control
concept was derived from the convoy escort mission and consisted of a helo
carrier which would provide continuous ASW presence. Around 14 helos on the ship would ensure that
a couple were always airborne.
Sea control as often
discussed today has evolved to include anti-surface and medium range anti-air
in addition to the original ASW role. Some
even credit a sea control ship with a Marine complement for limited land
operations. The sea control ship most
commonly described is a small hybrid carrier with a combination of fixed wing
aircraft (Harriers, originally, and now F-35Bs) and helos with, perhaps, some
AEW aircraft depending on who’s proposing the idea.
The Navy has experimented
with the idea in the past. The USS Guam
was set up as a sea control vessel for a time.
Other countries have also experimented with the concept. Notably, the Japanese have developed the
helicopter destroyer (DDH) and the Soviets developed the Moskva class which combined
a bit of a cruiser with an ASW helo carrier.
A sea control ship is one of
those ideas that sounds good on paper but may not be worth it in reality.
Let’s consider its
function. All sea control concepts seem
to have ASW as the core function with the major capability being provided by
helos. Fair enough. Now let’s think through the ship’s usage in a
war against a peer.
A helo carrier is not going
to have much in the way of AAW protection other than RAM type short range
self-defense weapons. That means that in
combat it would either need to be defended by more capable ships (a Burke,
presumably) or relegated to peripheral combat areas that would not expect to
see major enemy activity.
An escort is feasible but
removes a highly capable vessel from other duty. On the other hand, a Burke is, theoretically,
ASW capable. I say theoretically because
Navy destroyers do not practice ASW enough to be proficient. Still, a helo carrier and a Burke or two acting
as a hunter-killer group is not a bad idea if we have enough Burkes to devote
to this. Presumably, this kind of group
would be effective protecting approaches to other naval groups or attempting to
deny known enemy submarine transit routes or operational areas.
Without an escort, a helo
carrier would be relegated to peripheral activities such as protecting distant sea
lanes or sitting on chokepoints. Is this
a worthwhile activity? A carrier, even a
smaller helo carrier is still very expensive to build, man, and operate. If we think we can get enough benefit for the
low risk then it would be worth it. On
the other hand, if the risk is low it’s probably because the possibility of
reward is also low.
Finally, let’s look at the
more modern definition of sea control.
Some people advocate a sea control vessel that is a jack of all
trades. It would have fixed wing
aircraft (F-35B) and helos, anti-ship missiles, and at least medium range area
AAW. Frankly, I’m not sure what role
such a ship would play in major combat.
It would be like an aviation frigate:
capable of lots of tasks but incapable of anything serious on its
own. It could operate with a carrier
group but would be redundant since a carrier has its own ASW helos. It could operate with an amphibious group but
an amphibious group would always have a carrier supporting it so, again, it
would be redundant. It might be useful
as a convoy escort which, of course, is what the modern frigate was intended to
be.
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Notional Sea Control Ship |
Considering the various
options and scenarios, it seems as if the Japanese DDH might be the best
implementation of this concept. If so,
that’s not exactly the sea control concept.
Instead, it’s more of a focused ASW vessel.
The very idea of a sea
control ship during war is on of those concepts that is appealing when
considered in isolation but fails to stand up to rigorous analysis. Proponents envision a sea control ship
staking out a patch of ocean and then destroying enemy patrol craft and
submarines. Voila, a secured patch of ocean
at a fraction of the cost of a carrier group!
Now, let’s apply some analytical
thinking to that concept. Can a sea
control ship fight an enemy destroyer similar to a Burke? No.
That’s not even remotely realistic.
Can it fight fast attack craft (anti-ship missile boats/FAC)? Under the right circumstances, possibly. A helo, armed for anti-ship missions, can
certainly defeat a FAC since very few FACs have any significant AAW
capability. However, the FACs generally
far outrange the detection limits of a sea control ship’s sensors. For example, the Chinese Type 022 (Houbei)
missile boat carries C-80X anti-ship missiles that have a range of 60-200
miles, depending on the missile type. A
sea control ship’s onboard sensors would have an effective range out to the
horizon (20 miles, say). Of course, the
ship’s helos could extend that range but every helo dedicated to surveillance
is a helo subtracted from the ASW mission.
So, yes, if a sea control
ship were willing to partially or completely sacrifice its ASW mission, it
could detect and effectively attack FACs.
Of course, ASW is the foundation mission for a sea control ship so
detracting from that mission is a risky proposition.
Now, what about when the sea
control ship is detected by the enemy and faces aerial attack from aircraft
and/or missiles. The ship’s defenses would
be limited to short range or point defense (RAM, most likely). This is completely inadequate for AAW. Some people argue for a sea control ship with
a sizable fixed wing aviation component (F-35B, presumably). Of course, once you upsize the ship to carry
both a large helo and fixed wing component, you’re no longer talking about a
sea control ship – you’re now talking about a nearly full size carrier which
has been proven to be almost as costly to build, man, and operate as a supercarrier
but without the full size carrier’s capacities and capabilities. So, sticking with a small to moderate size
sea control vessel, we see that it is completely vulnerable to air attack. An escort, such as a Burke, could be provided
but, again, that takes the Burkes away from their other high end tasks and
negates the very rationale of the sea control ship which is that it can free up
high end ships for high end tasks. We
could add VLS cells to provide a medium range AAW capability but, again, that
increases the size of the ship for what would be a very modest increase in AAW.
What about ASW, the
foundation mission for a sea control ship?
A sea control ship with a handful of ASW helos would be as effective as
a surface ship can be and, in the right scenario, could be a useful and
effective asset. The problem is that
helos are notoriously unreliable and high maintenance. Thus, you need several helos in order to
maintain a few in continuous operation.
That’s fine – inefficient but fine.
Such a sea control ship sitting atop chokepoints or transit routes could
prove highly effective at controlling enemy submarine activity. Recall, though, that in order to protect
itself from enemy FACs the ship would have to dedicate several helos to
surveillance which would not leave enough helos available for effective
ASW. Unless we postulate a very much
larger ship (America class size), a sea control ship just can’t carry enough helos for both
the surveillance/counter FAC mission and ASW, simultaneously.
All of this leads us to the
conclusion that a sea control ship is not an effective or efficient concept for
war unless we’re willing to dedicate one or more high end Burke escorts for its
protection. If we have sufficient Burkes
then this becomes a viable concept. If
not, it isn’t. This also suggests that a
lesser Burke, say a modern frigate, might be a viable escort although the Navy
currently has no plans to acquire a frigate.
Thus, the sea control ship,
with ASW as its primary mission, is appealing in concept but fails when one considers
the details of wartime employment unless a high end escort is provided.