CURV

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U.S. Navy CURV-III during Pisces III rescue
U.S. Navy CURV-III

CURV-III was the fourth generation of the

Pisces III with just minutes of air remaining. The CURV-III became known in the Great Lakes region in 1976 when it was used to survey the wreck of the SS Edmund Fitzgerald. CURV-21
is the current generation that replaced CURV-III.

History

CURV was developed by Naval Ordnance Test Station, Pasadena, California, US in the early 1960s. It was initially designed to recover test ordnance lost off San Clemente Island at depths as great as 2,000 feet (610 m). CURV was the pioneer for teleoperation.[1] CURV-III is the fourth generation of CURV. After the Space Shuttle Challenger disaster, CURV III was transferred to the Navy's Supervisor of Salvage who directed that it be upgraded from 10,000 feet (3,000 m) operations to 20,000 feet (6,100 m).[1] The CURV-21 is the next generation following CURV-III and was built as its direct replacement.[2]

CURV-III was sent to the National Museum of the U.S. Navy in 2012[3] and she is located in the Cold War Gallery.[4]

Features

CURV-III had a functional design capable of operations at 10,000 feet (3,000 m). It had an open metal frame that was 6.5 feet (2.0 m) by 6.5 feet (2.0 m) by 15 feet (4.6 m), weighed approximately 5,400 pounds (2,400 kg), and was slightly buoyant in water. A cable and surface equipment enabled deployment and operation of the vehicle from a surface support ship.[5] The CURV-III carried:

[T]wo Vidicon television cameras, four mercury-vapor headlights, two mercury-vapor spotlights, and a 35-millimeter camera with a 500 frame color film capacity and strobe light ... mounted on two independent pan-and-tilt units, each with 360 degrees of lateral and 180 degrees of vertical movement. The vehicle thus has full viewing and self-inspection capability.[5]

Other support systems included active and passive sonar, altimeter, depthometer, and compass. It had a tool assembly mounted on the bow that included a manipulator claw. Other tools and lifting devices could be mounted for particular tasks.[6]

Notable operations

1966 H-bomb recovery

In the

hydrogen bomb was lost in the Mediterranean Sea when a B-52 bomber collided with a KC-135 tanker near Palomares, Spain. The bomb was located, at a depth of 2,900 feet (880 m), by the United States Navy submersible DSV Alvin after a 2½ month search. After Alvin was unsuccessful in recovering the bomb, the Navy brought in CURV-I. CURV-I was successful in attaching grapnels to the bomb but became entangled in the bomb's parachute lines. The entangled bomb, parachute, and CURV-I were successfully raised together to the surface 81 days after the original incident.[7]

1973 Pisces III rescue

Pisces III, a Canadian commercial submersible, was used to lay

scuba divers were able to attach lines that were used to lift Pisces III the rest of the way to the surface.[6] CURV-III performed the deepest underwater rescue in history when Pisces III's two-man crew was rescued after 76 hours with just minutes of air remaining.[8][9][10][11]

1976 SS Edmund Fitzgerald survey

CURV-III became known in the Great Lakes region in 1976 when it was used to survey the wreck of the

USCGC Woodrush and logistics support was provided by USCG Point Steel. CURV-III logged twelve dives in 500 feet (150 m) of water with more than 56 hours of bottom time. The dives produced 43,000 feet of videotape and 895 still photographs. The CURV-III underwater survey confirmed that the Fitzgerald was well beyond normal commercial salvage. Observers of the survey concluded that there was more damage to the Fitzgerald than expected but were unable to determine the cause of its foundering.[12] Although operators of CURV-III were fully prepared to recover bodies during the survey, they did not locate any of the 29-man crew. An independent researcher was contracted to review the survey results and produce the sketches of the wreck used in the United States Coast Guard and National Transportation Safety Board investigation reports.[13]

2023 Missing submersible incident

Main article:
2023 Titan submersible incident

CURV-21, which can reach 20,000 feet below the surface of water was being used to search for OceanGate submersible named Titan.[14]

References

  1. ^ a b "Cable-controlled underwater recovery vehicle". Federation of American Scientists. 1999-11-25. Retrieved 2017-08-07.
  2. ^ "CURV 21 – Remotely operated vehicle". United States Navy. 2010-09-13. Retrieved 2010-11-28.
  3. ^ "National Navy Museum Receives Deep Sea Submersible". United States Navy. 2012-07-05.
  4. ^ "Undersea Exploration". Retrieved 2017-11-29.
  5. ^ a b Larry K. Brady, Arthur J. Schlosser (1982-05-06). "Ten years of operation experience with CURV III". One Petro. Retrieved 2010-12-01.
  6. ^ a b c Schlosser, Arthur J. (1977-08-01). SALVOPS 73: NAVSEA 0994-LP-012-6050 (PDF). Naval Sea Systems Command. pp. 1–29. Archived from the original (PDF) on 2011-10-08. Retrieved 2010-12-01.
  7. Invention & Technology Magazine, Vol. 20, Issue 2. Archived from the original
    on 2008-12-02. Retrieved 2010-12-01.
  8. ^ a b Scott, David (1974). "Way out machines lay new high-traffic cable". Popular Science. 204 (1). Times Mirror Magazines: 82–85. Retrieved 4 February 2014.
  9. ^
    LCCN 62-4818
    .
  10. ^
    ISBN 1-55821-663-4
    .
  11. ^
    LCCN 75-19154
    .
  12. ISBN 0-932212-18-8
    .
  13. ISBN 0-932212-88-3
  14. ISSN 0362-4331
    . Retrieved 2023-06-22.

External links
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