Subsea Acoustic Positioning and Spool Metrology Online Course

Subsea metrology is the process of acquiring accurate measurements for the connection of subsea structures and pipelines. IMCA’s guidance covers the most commonly used techniques today. These are long baseline (LBL) acoustics, both diver taut wire and digital taut wire, photogrammetry and inertial navigation systems (INS). This course cover basic principles, along with engineering requirements, different methods and technologies, and some of the advantages and limitations for each technique.Show more

The objective of subsea metrology is to determine accurately the relative horizontal and vertical distance between subsea assets, as well as their relative heading and attitude.

Absolute positioning is not necessary as the objective is to know the three-dimensional range and bearing between relative hubs or flanges. A primary issue is defining the measurement point on the hub or flange. Ideally, it should be as close as possible to the centre, but this is not always possible. The hub might have a pressure cap, the instrument package might be too big to fit on to the hub or access to the hub might be restricted.

An offset sensor mounting is then created, called the observation point. There are many different solutions for mounting sensors, depending on the instrument – how much it weighs, what measurement procedure is required, etc. For many subsea applications the most widely used solution is a female receptacle on the structure and the instrument mounted on a male stab.

For full videos you can visit this link :

https://drive.google.com/file/d/1CVLUl2IpxGSJ7dRpSJwmjy3WpVz8o27E/view?usp=sharing

https://bit.ly/47lHhph

and you will be directed to a google drive link where you can download all files of this course

https://drive.google.com/file/d/1F4V0vD_qyqcTH5lQUskLv805Wr8Swwbf/view?usp=drive_link