sentences:  It was finished in 1974 by precise reduction of some 3000 stellar plates and network adjustment of 46 stations (2 additional ones in Germany and the Pacific, but without the areas of Russia and China).The mean accuracy was between ±5 m (Europe, USA) and 7–10 m (Africa, Antarctica), depending of weather and infrastructure conditions.Combined with Doppler measurements the global accuracy was even 3 m. This is more than 20 times better than previously, because the gravity field up to 1974 couldn't be calculated better than 100 meters between distant continents.