The Needles vehicles transporting disabled visitors. This is because the single track road's position close to the cliff edge is considered dangerous for multiple car use. The Isle of Wight Coast Path has its westernmost point at the Coastguard Cottages. The Needles' pointed shape is a result of their unusual geology. The strata have been so heavily folded during the Alpine Orogeny that the chalk is near vertical. This chalk outcrop runs through the centre of the Island from Culver Cliff in the east to the Needles in the west, and then continues under the sea to the Isle of Purbeck, forming
Guglielmo Marconi distinguish from atmospheric noise. A detailed technical review of Marconi's early transatlantic work appears in John S. Belrose's work of 1995. The Poldhu transmitter was a two-stage circuit. Feeling challenged by skeptics, Marconi prepared a better organised and documented test. In February 1902, the SS "Philadelphia" sailed west from Great Britain with Marconi aboard, carefully recording signals sent daily from the Poldhu station. The test results produced coherer-tape reception up to , and audio reception up to . The maximum distances were achieved at night, and these tests were the first to show that radio signals for medium wave and