Our Surveying Instruments Division delivered and trained the high accuracy Trimble DA2 GNSS to PTT Public Company Limited by our professional product specialist. The main purpose is for topographic surveying and locating the gas pipeline to maintenance. Due to the high expense of drilling the gas pipeline, the officers need to locate the position where to start the drill accurately (centimeter-level). Some of the area is quite hard to access so the equipment should be portable, light weight, robust and still productive and provide the accurate position. The problems are completely solved with our Trimble DA2. Trimble DA2 allow surveyors carry them along their works conveniently with just only 0.3 kgs. - light as feather. The surveyors can use their smartphone to control, collect and display data with the 1-4 cm. accuracy after receiving correction signal from Trimble RTX satellite service. Compact, lightweight, accurate – Trimble DA2.