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Lockheed EP-3 Aries

Lockheed / Boeing · SIGINT / ELINT · USA · Early Jet (1946–1969)

Lockheed EP-3 Aries — SIGINT / ELINT
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The Lockheed EP-3 Aries II is an American signals-intelligence + electronic-reconnaissance aircraft — Lockheed's principal US Navy land-based SIGINT platform + the Navy's counterpart to the USAF RC-135 family. Lockheed developed the EP-3E Aries from P-3 Orion airframes in 1969-1971; service entry 1971. The improved EP-3E Aries II (the current variant) entered service in 1993 with reworked mission systems. About 12 EP-3E Aries II aircraft serve US Navy Fleet Air Reconnaissance Squadron VQ-1 (Whidbey Island) + previously VQ-2 (Naval Station Rota, Spain — disbanded 2008). The aircraft is being replaced by the future MQ-4C Triton + the planned EA-XX or P-8-derived SIGINT platform.

The EP-3E Aries II uses the standard P-3C airframe: 4 × Allison T56-A-14 turboprops, maximum speed 760 km/h, range 4,400 km, service ceiling 8,625 m, MTOW 64,410 kg. The aircraft carries massive mission-equipment antennas — long ventral fairings (Surface Search radar + CHALS communications), large dorsal antenna fairings (HF + VHF + UHF + SHF receivers), + 1.2 m chin radomes — clearly distinguishing it from regular P-3 airframes. Crew: 4 flight crew + 24 mission specialists. The Aries II's mission systems collect + analyse VHF, UHF, microwave radio + radar emissions across the spectrum.

EP-3E service includes 50+ years of Cold-War-through-modern SIGINT collection worldwide. The most-famous incident: the 1 April 2001 Hainan Island Incident — a US Navy EP-3E (BUNO 156511, VQ-1) was intercepted over the South China Sea by 2 PLA Naval Aviation J-8II fighters; a collision occurred when one J-8II flew too close, killing the Chinese pilot Wang Wei + severely damaging the EP-3E. The crippled EP-3E made an emergency landing on Chinese Hainan Island; the 24 US crew were detained 11 days while China + US negotiated. The crew destroyed classified equipment + materials before landing; the aircraft was eventually returned (disassembled) to the US in July 2001. The incident was a major US-China diplomatic crisis + the most-serious US-China military incident since the 1996 Taiwan Strait Crisis.

For Kids — a shorter, friendlier version

The EP-3E Aries II is an American spy plane used by the United States Navy. It was built by a company called Lockheed. The plane is based on an older aircraft called the P-3 Orion. Lockheed started building the first version in 1969 and finished in 1971.

The Aries II is a big plane. It weighs as much as 64,410 kilograms — heavier than ten large elephants! It has four turboprop engines that spin large propellers. The plane can fly as fast as 760 kilometers per hour and travel up to 4,400 kilometers without stopping.

This plane has a very special job. It listens to radio signals and gathers information from the sky. It carries lots of special antennas on its body to do this. These antennas make it look very different from a regular P-3 plane. It has bumps and fairings on the top, bottom, and nose.

The Aries II needs a big crew to fly and work. Four people fly the plane. Another 24 people run the special spy equipment inside. That is 28 crew members in total! The Navy keeps these planes at a base called Whidbey Island.

One famous event happened in April 2001. An Aries II plane had a close encounter with a Chinese fighter jet near Hainan Island. The Navy is now replacing the Aries II with newer aircraft like the MQ-4C Triton drone.

Fun Facts

  • The EP-3E Aries II first entered service in 1971 — over 50 years ago!
  • The improved Aries II version arrived in 1993 with brand-new spy systems inside.
  • The plane carries 28 crew members total — four pilots and 24 spy-gear operators.
  • The Aries II is heavier than ten large elephants, with a max takeoff weight of over 64,000 kilograms.
  • It can fly nearly 4,400 kilometers without refueling — that is like crossing a whole ocean!
  • The plane has big antennas on its top, bottom, and nose to listen to radio signals from far away.
  • In April 2001, an Aries II had a famous mid-air incident near Hainan Island with a Chinese jet.
  • The Navy is replacing the Aries II with a modern drone called the MQ-4C Triton.

Kids’ Questions

What does the EP-3E Aries II do?

The Aries II is a spy plane. It flies high in the sky and listens to radio signals from other countries. Special equipment and 24 trained operators on board collect and study the information gathered.

How is the Aries II different from a regular P-3 plane?

The Aries II has lots of extra antennas and bumpy fairings on its body. These parts help it listen to signals in the air. A regular P-3 does not have all these special add-ons.

What happened near Hainan Island in 2001?

In April 2001, an Aries II plane had a dangerous close encounter with a Chinese fighter jet near Hainan Island. It was a famous and tense event between the American Navy and China.

What will replace the Aries II?

The Navy plans to replace the Aries II with newer aircraft. One of them is the MQ-4C Triton, which is a large drone. There are also plans for other new spy planes based on the P-8 aircraft.

Variants

EP-3E Aries (1971)
Original variant. Replaced by Aries II.
EP-3E Aries II (1993)
Current variant. ~12 aircraft.

Notable Operators

US Navy VQ-1 (1971-present)
Sole operator. Whidbey Island, WA.

Frequently Asked Questions

What happened in the 2001 Hainan Island Incident?

On 1 April 2001, a US Navy EP-3E Aries II (VQ-1) flying a routine SIGINT mission over international waters in the South China Sea was intercepted by 2 PLA Naval Aviation J-8II fighters. One J-8II (piloted by Lt. Cmdr. Wang Wei) flew aggressively close + collided with the EP-3E's left propeller. The J-8II broke apart + Wang Wei was killed; his ejection seat was never found. The EP-3E's nose cone + left wing were severely damaged + the aircraft lost cabin pressurisation; the US crew declared an emergency + made an unauthorised emergency landing at Lingshui Airfield on Hainan Island. The 24 US crew destroyed classified equipment + the aircraft's compartmented intelligence in the 25 minutes between collision + landing. China detained the crew for 11 days while diplomatic negotiations resolved the crisis; the crew was released after a US 'letter of regret' (which carefully avoided the word 'apology'). The disassembled EP-3E was returned in July 2001. The incident contributed to long-term US-China tensions + accelerated US Navy investment in unmanned platforms.

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