ARGENTINE GRAIN SHIPPING SITUATION One grain vessel was awaiting berth at Bahia Blanca, four at Buenos Aires and five at Rosario, on March 31, National Grain Board figures show. The situation at these ports was as follows, giving the number of ships loading, awaiting berth and expected respectively. Bahia Blanca - 4, 1, 1 Buenos Aires - 1, 4, 9 Rosario - 6, 5, 7 The tonnage of grain and oilseeds to be loaded onto ships loading, awaiting berth and expected at each port was as follows. Bahia Blanca - Wheat 161,360. Buenos Aires - Maize 104,304, Wheat 14,330. Rosario - Wheat 50,400, maize 157,040, subproducts 50,100, sunflowerseed 1,000 and millet 3,100.