UWSH CH7

Question 1

When using a Hogging line to conduct a UWUTG what must topside personnel ensure?

Answer 1

port and starboard frame numbers or location reference
points designated for hogging line placement are identical.

Question 2

What if the area required to be inspected is covered with marine growth?

Answer 2

Remove growth with a hand-held scrapper to expose an area large enough to perform the required scan.

Question 3

Throughout the dive what are divers involved reporting to topside NDT Inspector?

Answer 3

Any observed adverse hull conditions such as pitting, coating damage, scaling, corrosion, etc.

Question 4

During the scanning process, how should the diver position himself?

What can produce false measurements?

Answer 4

In such a manner that the exhaust, from the diving helmet, flows away from the work area.

An air pocket between the ultrasonic transducer and the inspection surface.

Question 5

Who interprets the measurements during a UWUTG?

What does UWUTG stand for?

Answer 5

The Topside NDT Inspector

*This is why constant communication is maintained during UWUTG

Underwater Ultrasonic Thickness Gauge Testing

Question 6

What do inspection reports contain at a minimum?

Answer 6

The entire QA package:
-A summary report listing any thin areas detected
-Including their location and surrounding hull condition

The computer-generated raw data.