Subsea Systems, Inc.
CTP-800 Underwater Cable Tracker
An easy to use Diver or ROV tool for detection and location of underwater communications cables
CTP-800 Underwater Cable Tracker is a replacement for the earlier model CTP-250
which was developed for the U.S. Navy Underwater Construction Team in the early
1980’s. The CTP-800 has improved upon this successful design by adding Digital
Signal Processing (DSP) capabilities. All probes are tested to 125 psi and are
shipped in a rugged, waterproof carrying case with waterproof operation and
maintenance manual. The CTP-800 locates and tracks most cables on which an AC
signal can be impressed. Four tracking frequencies allow differentiation between
nearby live cables.
CTP-800 is equipped with a high intensity LED display for dark water conditions
and a diver earphone. Additionally, data can be transmitted to the surface via
an RS-485 interface umbilical. Power can also be supplied through the umbilical.
operations the CTP-800 is mounted in a compact aluminum housing without the
battery compartment. Power is supplied from the ROV and RS-485 data is
transmitted to a surface PC for display and storage. Optional Left/Right sensors
can be added to simplify the tracking process.
deployment with the diver, the CTP-800 is preset to the specific frequency that
is impressed on the cable to be tracked. Upon determination of the general
location, the diver slowly waives the probe across the ocean floor while
watching the display or listening for an increase in the earphone signal.
tracking operation uses the “null” signal method. To either side of the
cable, the indicator lights are at maximum level (peak). However, as the probe
nears the cable, the number of display lights that are lit decrease. When the
probe is directly above and pointed straight down the cable, the display lights
decrease to a minimum reading and the cable position is very accurately
electronics are sensitive enough that in many cases, the cable can be located
from the surface, saving valuable time and resources. After cable location, the
diver can be deployed for precise tracking.
The ROV tracking operation is similar to the diver method and also uses the “null” method for accurate determination of cable position. The tracking sensor and electronics canister are mounted on the ROV. Power is supplied from the ROV and the RS-485 sensor data are transmitted to a surface PC display. To simplify operations, optional left and right direction sensors may also be installed on the ROV.
Operating Depth for Diver Tool: 250 feet (76.2 meters)
in Air: 4.1 pounds (1.9 kg)
in Seawater: 0.4 pounds (0.18 kg) negative
Led light bar display in 6 db steps, Audio to diver earphone, RS-485 data to
Type: 6 each, AAA Alkaline
Battery Mission Life: 8 hours minimum
and tracks surface-laid and buried cables
standard preset frequencies (25, 50, 60, 1024 Hz)
and Gain set by Optical Touch Switch or software command via umbilical
45 Degree Tilt Sensor enables estimation of Cable Burial Depth
lights: Leak detection and Low Battery
Display Configurations for Surface Monitoring
Configuration with Right/Left Direction and Center Null Indication
DOWNLOAD PDF FILE: CTP800-ds01.pdf
Last modified: August 16, 2010