A cyclonic storm in the Arabian Sea swept away two ships (like large boats) off the coast of Mumbai today with 410 people on board. Navy officials said two ships were swept away in the diamond oil field at Bombay High. Kablegaur said that boat-shaped ships are used for transporting goods in the oil field. NIS Kochi has been immediately dispatched to rescue the occupants. The oil field is located 70 km southwest of Mumbai.He said the warplane NIS would reach the spot around 4 pm.