MOCM - Massive Ordinance Cruise Missile

Background

Short of nuclear weapons, there are certain military targets that simply demand a Really Big Bomb (RBB).  Smaller ordinance just won't do.  And not just any RBB, such targets require a bomb with considerable earth and concrete penetration.  These targets include super-hardened airfield hangars; submarine pens; command and control facilities; and WMD storage, research and production facilities.

From Effects of Nuclear Earth-Penetrator and Other Weapons on Strategic Hardened and Deeply Buried Targets,

BASIC FACTS AND ESTIMATES
  • Following is a concise list of background facts and estimates relating to HDBTs:
  • Potential U.S. adversaries worldwide are using underground facilities to conceal and protect their leadership, military and industrial personnel, weapons, equipment, and other assets and activities. These facilities include hardened surface bunkers and tunnel facilities deep underground.
  • Many underground command, control, and communications (C3) complexes and missile tunnels are between 100 and 400 meters deep, with the majority less than 250 meters deep. A few are as deep as 500 meters or even 700 meters, in competent granite or limestone rock.
  • As identified by the Defense Intelligence Agency, there are about 10,000 HDBTs in the territory of potential U.S. adversaries worldwide.
  • Of the 10,000 HDBTs identified, about 20 percent are estimated to have a major strategic function.
  • Over half of these strategic HDBTs are located near or in urban areas.
  • The number of known strategic HDBTs is increasing at a rate of about 10 percent per year. This increase is attributable mostly to discovery by the U.S. intelligence community and to a lesser extent to construction in countries seeking protection from U.S. military capabilities.

Examples of HDBT

Entrance to Chinese super-hardened submarine base

PLAAF Underground Hangar (Kopp)



There are other targets that may not require such high degrees of penetration but may be effectively struck with a RBB, like large railroad bridges and damns.  It could take five or six 2,000lb class weapons to drop a bridge, where a single RBB might do the job.

Lastly, the Navy and Marine Corps has investigated using really big bombs to clear a surf zone and beach of obstacles and mines in preparation for an amphibious assault.  The idea is to essentially drop several RBBs in a line and detonate them simultaneously to throw mines and obstacles out of the way and create what amounts to a safe zone all the way through.

Massive Ordinance Penetrator


To hit these  some of these targets today, we have heavy bombers carrying the GBU-57A/B Massive Ordnance Penetrator (MOP).

GBU-57A/B MOP

Given "only" 40-60m of earth penetration, MOP clearly can't hold at risk all of the HDBTs outlined above, but it can still be used to collapse entrances.

The problem with MOP is that it requires a B-2 to carry it.  The forthcoming B-21 Raider may also be able to carry one, but little information is available on its capabilities.   We only have a handful of operational B-2s and no operational B-21s, so our ability to deliver this type of effect is extremely limited at present. 

Delivery of MOPs by B-2/21's requires the aircraft to fly almost directly over the target, as MOP has a limited standoff range.   This forces the bomber to fly deep into heavily defended airspace.
Kopp 2011

Proposal

Develop a large, fighter-sized, cruise missile called the Massive Ordinance Cruise Missile (MOCM) that can either take off directly from an airfield or catapult launch from an aircraft carrier and carries a single warhead of MOP-level penetration.  The Air Force plans to eventually replace the 30,000lb MOP with an advanced, ~10,000lb weapon with similar capabilities, called the Next-generation Penetrator Munition (NGP).   MOCM would carry a single NGP internally.  Ideally MOCM would have a range of at least 1,500nmi to allow it to hit targets deep within mainlaind China.

Stealth is obviously mandatory to give it a reasonable chance of penetrating defenses.  Terminal penaids such as chaff, flares and jamming may be required at the target.

MOCM could be around the same size and general configuration as the Northrop Grumman Tacit Blue aircraft, with foldable wings for carrier stowage.


MOCM has non-retractable, but jettisonable, landing gear and tail hook, allowing it to take off and land like a traditional aircraft. 

However, we need to be careful and avoid turning this into a reusable system, which would greatly drive up unit price and drive down expendability.  It's a missile, not a UCAV.

A few MOCMs could be carried by a CVN, tucked away in the corner of the hangar for when they're needed.  Or, they could be flown out to the carrier from land-based storage areas, unarmed, and mated with their NGP warhead on the ship before being re-fueled and launched to their target.

Given enough land- and sea-based MOCMs in theater, we could strike every enemy super-hardened facility simultaneously, at the beginning of the conflict, rather than the slow pace of using our handful of B-2s once every other day, or every third day, from CONUS or distant forward bases.

Follow-on MOCM payload could include:

  • A bunch of GBU-57 A/B Small Diameter Bombs to attack other targets where the quantity of DMPIs struck is more relevant than the size of each munition (e.g. other airfield targets like runways, taxiways, POL storage, command and control).
  • A bunch of MALD decoys and jammers. A MALD-equipped MOCM could be fired ahead of warhead carrying MOCMs to jam, and disrupt defenses ahead of the main strikes.


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