SHIPS HELD UP AT CALCUTTA Some 10 Indian ships have been held up at Calcutta port after four days of industrial action by local seamen, a spokesman for the shipowners' association INSA said. The dispute has prevented local crewmen signing on and off, but has not affected foreign ships with international crews docking at Calcutta, which exports tea and jute and imports machinery, crude oil and petroleum products, the spokesman said. Foreign ships may also suffer if dock workers join the action, he said. The Shipping Corporation of India (SCI) has asked its ships to avoid the port until the dispute is over, National Union of Seafarers in India president Leo Barnes said.