Emergency Action Message

Last updated

In the United States military's strategic nuclear weapon nuclear command and control (NC2) system, an Emergency Action Message (EAM) is a preformatted message that directs nuclear-capable forces [1] to execute specific Major Attack Options (MAOs) or Limited Attack Options (LAOs) in a nuclear war. They are the military commands that the US military chain of command would use to launch a nuclear strike. Individual countries or specific regions may be included or withheld in the EAM, as specified in the Single Integrated Operational Plan (SIOP). The SIOP was updated annually until February 2003, when it was replaced by Operations Plan (OPLAN) 8044. [2] Since July 2012, the US nuclear war plan has been OPLAN 8010-12, Strategic Deterrence and Force Employment. [3]

Contents

Overview

EAMs use cryptographic protocols (including such methods as digital signatures) to authenticate the messages, [1] thereby ensuring that they cannot be forged or altered.

In the United States, the EAM will be issued from the National Military Command Center (NMCC) at the Pentagon or, if it has been destroyed by an enemy first strike, by the Alternate National Military Command Center - Site R at Raven Rock, Pennsylvania or by the U.S. Air Force E-4B Nightwatch aircraft/U.S. Navy E-6A Mercury aircraft (TACAMO).

The messages are sent in digital format to nuclear-capable major commands. The messages are then relayed to aircraft that are on alert by the U.S. Strategic Command at Offutt Air Force Base in Omaha, Nebraska, via single-sideband modulation radio transmitters of the High Frequency Global Communications System (formerly known as the Global High Frequency System). The EAM is relayed to missile-firing nuclear submarines via special transmitters designed for communication with submarines. The transmitters include those designed to operate at Very Low Frequency (VLF). The submarines pick up the message via special antennas. Nuclear-capable forces will then be expected to carry out an EAM without fail. Crewed bombers may be recalled, but missiles fired from land-based silos or from submarines cannot be recalled.

Skyking messages

Skyking messages, also known as "Foxtrot Broadcasts", are also read on the same network as EAMs. These messages will interrupt an EAM if needed to be read. They contain a higher priority and time-sensitive code for orders that need immediate attention. [1]

The EAM system was featured extensively and used as one of the primary plot devices in the feature film Crimson Tide .

The start of a Sky King headed EAM message is briefly heard on the cockpit radio when the bomber crew are scrambled in the feature film By Dawn's Early Light .

See also

Related Research Articles

<span class="mw-page-title-main">Mutual assured destruction</span> Doctrine of military strategy

Mutual assured destruction (MAD) is a doctrine of military strategy and national security policy which posits that a full-scale use of nuclear weapons by an attacker on a nuclear-armed defender with second-strike capabilities would result in the complete annihilation of both the attacker and the defender. It is based on the theory of rational deterrence, which holds that the threat of using strong weapons against the enemy prevents the enemy's use of those same weapons. The strategy is a form of Nash equilibrium in which, once armed, neither side has any incentive to initiate a conflict or to disarm.

<span class="mw-page-title-main">TACAMO</span> US strategic communications system

TACAMO is a United States military system of survivable communications links designed to be used in nuclear warfare to maintain communications between the decision-makers and the triad of strategic nuclear weapon delivery systems. Its primary mission is serving as a signals relay, where it receives orders from a command plane such as Operation Looking Glass, and verifies and retransmits their Emergency Action Messages (EAMs) to US strategic forces. As it is a dedicated communications post, it features the ability to communicate on virtually every radio frequency band from very low frequency (VLF) up through super high frequency (SHF) using a variety of modulations, encryptions and networks, minimizing the likelihood an emergency message will be jammed by an enemy. This airborne communications capability largely replaced the land-based extremely low frequency (ELF) broadcast sites which became vulnerable to nuclear strike.

<span class="mw-page-title-main">Force de dissuasion</span> French nuclear deterrence force

The Force de dissuasion, known as the Force de frappe prior to 1961, is the French nuclear deterrence force. The Force de dissuasion used to be a triad of air-, sea- and land-based nuclear weapons intended for dissuasion, the French term for deterrence. Following the end of the Cold War, France decommissioned all its land-based nuclear missiles, thus the Force de dissuasion today only incorporates an air- and sea-based arsenal.

<span class="mw-page-title-main">Single Integrated Operational Plan</span> 1961–2003 US nuclear strategy document

The Single Integrated Operational Plan (SIOP) was the United States' general plan for nuclear war from 1961 to 2003. The SIOP gave the President of the United States a range of targeting options, and described launch procedures and target sets against which nuclear weapons would be launched. The plan integrated the capabilities of the nuclear triad of strategic bombers, land-based intercontinental ballistic missiles (ICBM), and sea-based submarine-launched ballistic missiles (SLBM). The SIOP was a highly classified document, and was one of the most secret and sensitive issues in U.S. national security policy.

<span class="mw-page-title-main">Strategic Forces Command</span> Military unit

The Strategic Forces Command (SFC), sometimes called Strategic Nuclear Command, forms part of India's Nuclear Command Authority (NCA). It is responsible for the management and administration of the country's tactical and strategic nuclear weapons stockpile. It was created on 4 January 2003 by the Vajpayee Government. Air Marshal Teja Mohan Asthana became its first commander-in-chief.

<span class="mw-page-title-main">Nuclear football</span> US device for a nuclear attack order

The nuclear football, officially the Presidential Emergency Satchel, is a briefcase, the contents of which are to be used by the president of the United States to communicate and authorize a nuclear attack while away from fixed command centers, such as the White House Situation Room or the Presidential Emergency Operations Center. Functioning as a mobile hub in the strategic defense system of the United States, the football is carried by a military aide when the president is traveling.

<span class="mw-page-title-main">AN/URC-117 Ground Wave Emergency Network</span> U.S. government command and control communications system

The Ground Wave Emergency Network (GWEN) was a US Air Force command and control communications system, deployed briefly between 1992 and 1994, intended for use by the United States government to facilitate military communications before, during and after a nuclear war. Specifically, the GWEN network was intended to survive the effects of an electromagnetic pulse from a high-altitude nuclear explosion and ensure that the United States President or their survivors could issue a launch order to Strategic Air Command bombers by radio.

The High Frequency Global Communications System (HFGCS) is a network of single sideband shortwave transmitters of the United States Air Force which is used to communicate with aircraft in flight, ground stations and some United States Navy surface assets. All worldwide receiving and transmitting sites in the HFGCS system are remotely controlled from Andrews Air Force Base and Grand Forks Air Force Base. Before 1 October 2002 it was known as the Global High Frequency System (GHFS).

<span class="mw-page-title-main">National Military Command Center</span> Main war rooms for the President and Secretary of Defense in the Pentagon

The National Military Command Center (NMCC) is a Pentagon command and communications center for the National Command Authority. Maintained by the Department of the Air Force as the "DoD Executive Agent" for NMCC logistical, budgetary, facility, and systems support; the NMCC operators are in the Joint Staff's J-3 (Operations) Directorate. "The NMCC is responsible for generating Emergency Action Messages (EAMs) to missile launch control centers, nuclear submarines, recon aircraft, and battlefield commanders".

<span class="mw-page-title-main">Nuclear triad</span> Set of three types of nuclear-strike weapons

A nuclear triad is a three-pronged military force structure of land-based intercontinental ballistic missiles (ICBMs), submarine-launched ballistic missiles (SLBMs), and strategic bombers with nuclear bombs and missiles. Countries build nuclear triads to eliminate an enemy's ability to destroy a nation's nuclear forces in a first-strike attack, which preserves their own ability to launch a second strike and therefore increases their nuclear deterrence.

The Gold Code is the launch code for nuclear weapons provided to the President of the United States in their role as commander-in-chief of the armed forces. In conjunction with the nuclear football, the Gold Codes allow the president to authorize a nuclear attack. Gold Codes, as well as a separate nuclear football, are also assigned to the vice president in case the president is incapacitated or otherwise unable to discharge the duties of office pursuant to the Twenty-fifth Amendment to the United States Constitution.

A military operation plan is a formal plan for military armed forces, their military organizations and units to conduct operations, as drawn up by commanders within the combat operations process in achieving objectives before or during a conflict. Military plans are generally produced in accordance with the military doctrine of the troops involved. Because planning is a valuable exercise for senior military staff, in peacetime nations generally produce plans even for very unlikely hypothetical scenarios.

<span class="mw-page-title-main">Operation Looking Glass</span> American command and control center

Looking Glass is the historic code name for an airborne command and control center operated by the United States. In more recent years it has been more officially referred to as the ABNCP. It provides command and control of U.S. nuclear forces in the event that ground-based command centers have been destroyed or otherwise rendered inoperable. In such an event, the general officer aboard the Looking Glass serves as the Airborne Emergency Action Officer (AEAO) and by law assumes the authority of the National Command Authority and could command execution of nuclear attacks. The AEAO is supported by a battle staff of approximately 20 people, with another dozen responsible for the operation of the aircraft systems. The name Looking Glass, which is another name for a mirror, was chosen for the Airborne Command Post because the mission operates in parallel with the underground command post at Offutt Air Force Base.

The "Schlesinger Doctrine" is the name, given by the press, to a major re-alignment of United States nuclear strike policy that was announced in January 1974 by the US Secretary of Defense, James Schlesinger. It outlined a broad selection of counterforce options against a wide variety of potential enemy actions, a major change from earlier SIOP policies of the Kennedy and Johnson eras that focused on Mutually Assured Destruction and typically included only one or two "all-out" plans of action that used the entire U.S. nuclear arsenal in a single strike. A key element of the new plans were a variety of limited strikes solely against enemy military targets while ensuring the survivability of the U.S. second-strike capability, which was intended to leave an opening for a negotiated settlement.

<span class="mw-page-title-main">AN/DRC-8 Emergency Rocket Communications System</span> US Strategic Forces system to communicate with ballistic missiles in use from 1963–1991

The Emergency Rocket Communications System (ERCS) was designed to provide a reliable and survivable emergency communications method for the United States National Command Authority, using a UHF repeater placed atop a Blue Scout rocket or Minuteman II intercontinental ballistic missile. ERCS was deactivated as a communication means when President George H.W. Bush issued a message to stand down SIOP-committed bombers and Minuteman IIs on 27 September 1991. Headquarters SAC was given approval by the Joint Chiefs of Staff to deactivate the 494L payloads beginning 1 October 1992. However, Headquarters SAC believed it was inefficient and unnecessary to support ERCS past fiscal year 1991, and kept the accelerated deactivation schedule.

The Green Pine UHF communications system was designed to relay Strategic Air Command (SAC) Emergency Action Messages (EAMs) to SAC aircraft. Green Pine was designed in 1967. Each Green Pine station was equipped with a variety of communications systems, to ensure that nuclear command and control messages would reach nuclear strategic bombers in Northern latitudes.

The Minimum Essential Emergency Communications Network (MEECN) is a network of systems providing uninterrupted communications throughout the pre-, trans-, and post-nuclear warfare environment. At minimum, MEECN is designed to provide a one-way flow of information to activate nuclear forces during severe jamming and a post-nuclear environment.

<span class="mw-page-title-main">Air Force Satellite Communications</span>

The United States military's Air Force Satellite Communications (AFSATCOM) is a network of ground and space systems to allow rapid dissemination of communications to a worldwide audience. AFSATCOM's creation was during the height of the Cold War to guarantee that Emergency Action Messages would be received by Strategic Air Command nuclear forces.

<span class="mw-page-title-main">Strategic Communications Wing One</span> Military unit

Strategic Communications Wing 1 is a nuclear command and control wing of the United States Navy. Its TACAMO mission provides airborne communications links to nuclear missile units of United States Strategic Command. It is located at Tinker Air Force Base, Oklahoma.

References

  1. 1 2 3 "The HF-GCS and Emergency Action Messages". Numbers Stations Research. n.d. Archived from the original on 10 March 2022. Retrieved 13 July 2022.
  2. Kristensen, Hans M. (15 September 2006) [21 December 2004]. "U.S. Changes Name of Nuclear War Plan". The Nuclear Information Project. Federation of American Scientists. Archived from the original on 9 March 2022. Retrieved 13 July 2022. The Pentagon has formally changed the name of the U.S. strategic nuclear war plan SIOP (Single Integrated Operational Plan). The new name is OPLAN (Operations Plan) 8044 Revision (FY).
  3. Kristensen, Hans M. (4 April 2013). "US Nuclear War Plan Updated Amidst Nuclear Policy Review". Federation of American Scientists . Archived from the original on 16 June 2022. Retrieved 13 July 2022. At the same time the White House is finishing a review of nuclear weapons policy, U.S. Strategic Command has quietly put into effect a new strategic nuclear war plan. [...] The new plan, which entered into effect in July 2012, is called OPLAN 8010-12 Strategic Deterrence and Force Employment. It replaces an earlier plan from 2008, that was revised in 2009.

Further reading