The Needles the Isle of Wight, often photographed by visitors, and are featured on many of the souvenirs sold throughout the island. The main tourist attractions of the headland itself are the two gun batteries, the experimental rocket testing station, and the four Coastguard cottages owned by the National Trust. A branch of the National Coastwatch Institution is also based at the Needles, sited near the New Battery and Rocket Testing Site on High Down. The Needles – Landmark Attraction (previously known as The Needles Pleasure Park) situated at the top of the cliff at Alum Bay is a small amusement park.
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