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350 Cable Survey System

DPN 402197 © TSS (International) Ltd Page 4 of 30

❐ Which communication method to use between the SEP and the SDC. This will

depend upon the characteristics of the umbilical cable. See Section 4 for guid-

ance.

❐ Whether to use an altimeter or a rapid update profiler, and their location on the

ROV.

❐ The type and capacity of data logger, and its connection and communication

requirements. Check that the data logger will be compatible with the data format

supplied by the 350 System.

❐ TSS recommends that you should generate a written or printed copy of the Sys-

tem configuration before and again after the survey. This will be useful source of

reference during the data analysis phase of the survey. This recommendation

means you should arrange to connect a suitable printer to the SDC LPT1 port.

❐ The on board facilities for creating, displaying and recording video images from a

sub-sea camera mounted on the ROV. Consider using the video facilities to

record the installation procedure of the 350 System.

The standard 350 System includes a field support kit (FSK) for use with the sub-sea

installation. Only engineers who have attended Part 2 of the relevant TSS training

course should use the FSK.

7.2 DURING THE SURVEY

This sub-section lists and explains a basic series of suggested operations and proce-

dures to include in a survey that uses the 350 System. However, you should always fol-

low the specific requirements of the survey planning team, who may require you to

modify or add to these procedures. Contact TSS for advice if necessary.

The DeepView Run Window, described in sub-section 6.2.1.2, provides access to all

the facilities you will need during a survey that involves the 350 System. By referring

to this window and other features of DeepView, perform the survey:

1. Safety and pre-dive checks.

Make a series of checks on the installation before you deploy the ROV. See sub-

section 7.2.1.

2. Print the System configuration details.

Select File➥Print Configuration in the DeepView toolbar to send a copy of the 350

System details to the Windows™ Notepad application. You should print the details

from this application and save the printed copy with the survey records.

3. Deploy the ROV.

Begin the survey with the ROV close to the expected target position.

4. Check signals from the SEP.

Use the Scope and Spectrum Analyser window again to confirm that the SEP is

receiving signals (tone, mains frequency, harmonics and noise) on all channels.

Check for valid signals from the sub-sea altimeter.

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