A Study of CTD Cables and Lowering Systems

Abstract

This study first reviews both the electrical and mechanical modes and causes of failure of electromechanical (E/M) cables used to lower deep sea sensors, such as CTD instruments, from oceanographic ships. It then outlines measures or steps that could be taken to correct some of the deficiencies observed and improve the systems presently used. These measures include quality control, tests, operational limits, improved handling and maintenance, improved machinery. The study then surveys alternative cables for lowering the sensors and convey the information from the sensors back to the ship. These alternatives include strength members other than steel (Kevlar) and signal carriers other than conventional copper conductors (fiber optics). The final section - Conclusions - summarizes the recommendations, based on this study, for improving the reliability of present and future CTD lowering systems.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1979
Accession Number
ADA080996

Entities

People

  • D. A. Moller
  • H. O. Berteaux
  • R. G. Walden
  • Y. C. Agrawal

Organizations

  • Woods Hole Oceanographic Institution

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Deficiencies
  • Fiber Optics
  • Maintenance
  • Oceanographic Ships
  • Optics
  • Quality Control
  • Reliability
  • Ships

Readers

  • Oceanography.
  • Optical Fiber Sensing and Electromagnetic Propagation.
  • Systems Analysis and Design

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems