abstract
Observations from a shipborne ionosonde at Gough Island (40,4� S, 9,9� W) are presented for a 21-day period, extending from 13 October to 2 November, 1975. The maximum median foF2 value was found to be 9,2 MHz, while the minimum median foF2 value was 3,2 MHz. A comparison with four surrounding stations is made. Observations were also made during the voyages from Cape Town to Gough Island and back for October/November, 1975 and August/ September, 1976. The observations show a marked increase in foF2 as recorded on board ship when compared to observations made at Grahamstown, with a maximum increase of 5 MHz.