Seismic refraction experiments were conducted by METEOR and INS KISTNA over the continental margins off the Gulfs of Cambay and Kutch in February – March 1965 as a part of the International Indian Ocean Expedition programme. Preliminary results obtained from these experiments were presented by Rao (1967) and Closs and Hinz (1967) in the Symposium on “Upper Mantle Project” at Hyderabad. Final analysis and interpretation of the above seismic records have been carried out at the BUNDESAUSTALT FUR BODENFURSCHUNG, Hannover, West Germany jointly by Dr. H. Closs, Dr. K. Hinz and the present author. Recently magnetic surveys over the continental shelf off the Kathiawar Coast were carried out by the author during March- April 1970 on board INS SUTLEJ. Geophysical surveys conducted over the oceanic areas adjacent to the Kathiawar coast and Cambay basin are meagre. Other than the work reported here, as far as the author is aware, seismic surveys in the Gulf of Cambay by the Oil and Natural Gas Commission (Sengupta, 1967), gravity and magnetic surveys off Bombay by H.M.S. OWEN (Takin, 1965) and magnetic survey off Bombay by National Geophysical Research Institute (NGRI Annual Report, 1968-69) have been conducted. Crustal features as established by the joint interpretation of the seismic records (Rao, 1968) and those delineated by the author from the recent magnetic surveys are discussed in relation to the already known tectonic features over the neighbouring continental areas and the ocean bottom.