on the progress report on the twenty-ninth session of the Ad hoc Group of Scientific Experts to Consider International Co-operative Measures to Detect and Identify Seismic Events, contained in document CD/981, which was introduced by Dr. Ola Dahlman of Sweden on 5 April. The delegations on whose behalf I am speaking highly appreciate the continued excellent work carried out by the Group, under its mandate set out in CD/46, in "elaborating instructions and specifications for international co-operative measures to detect and identify seismic events ... which might be established in the future for the international exchange of seismological data under a treaty prohibiting nuclear weapon tests covering nuclear explosions for peaceful purposes in a protocol which would be an integral part of the treaty". We note with great satisfaction that the second phase of the Group's Second Large-scale Technical Test (GSETT-2) started successfully on 16 January 1990. Dr. Dahlman stated that "to operate a system in the real world differs considerably from conceptually designing it", but we are confident that the success of the phase 3 full-scale experiment now planned for the first half of next year has been made more likely by improved preparation to be conducted under the revised schedule of remaining GSETT-2 activities. We share with the group its satisfaction that efforts are under way in some 10 additional countries to join the experiment and to establish national data centres. We welcome the Group's decision that countries able to contribute only level I data may now also participate in GSETT-2. And we sincerely hope that together with the rescheduling of future activities, this will encourage those countries which have not yet done so, especially in South America, Africa and Asia, to join in the work of the Group. Before concluding, we would like to express our sincere appreciation to 
**Analysis**
The text appears to be a report on the progress of a scientific group working on international cooperative measures to detect and identify seismic events, likely related to nuclear test detection. The language used is technical and formal, suggesting a scientific or technical context. The report mentions specific activities, experiments, and countries involved, indicating a focus on international cooperation and scientific collaboration.

**Category**
Science and technology, International trade