she succeeded in transmitting wireless signals from the Pacific Ocean to England. This was a new record for the Marconi Company, achieved with a transmitter power of less than one Kilowatt. In January 1928, as Niagara crossed the Tasman Sea, she exchanged signals with a wireless station in Burnham-on-Sea in England. In 1925 Niagara had succeeded in transmitting to England from somewhere in the Pacific, but this latest achievement was claimed as a new record. A service was established by which passengers could send messages to England at a cost of 11 pence per word. Between 28 May and 9 June 1928 the Fokker F.VII aircraft Southern Cross made the World's first flight across the Pacific: from California via Fiji and Hawaii to Queensland. Its crew maintained hourly wireless contact with Niagara on each leg of the flight. In 1934 the new wireless call sign GNXP superseded Niagaras code letters JBSG and her original wireless call sign. In February 1936 the New Zealand Marine Department established a wireless direction finding beacon on Tiri Tiri Island, and asked ships to help to test it. Niagaras master recommended that a second beacon was needed for ships to fix their position by triangulation. However, the beacon on Tiri Tiri enabled ships to get accurate bearings from a range of up to . Modifications By October 1928 refrigerating equipment had been installed in Niagaras number one hold. This increased her refrigerated capacity by 450 tons, bringing the total to . In August 1929 Niagara received a month-long overhaul in Sydney. The domed skylight in her first class dining saloon was removed in order to increase the deck area of the first class lounge, which was immediately above the saloon. Her passenger accommodation was re-painted, re-decorated, re-carpeted, much of her furniture was replaced and the remainder was re-upholstered. In 1933 first Aorangi and then Niagara were given their biennial overhauls in Sydney. The Union Company's was to deputise for each ship in turn. Niagara was withdrawn from service when she reached Sydney on 14 August. Large sections of her deck were re-laid, and equipment to screen sound films aboard was installed in one of her lounges. Niagara returned to service at Sydney on 12 October as scheduled. The combined cost of overhauling the two ships was £60,000. Canadian–Australasian Line In 1930 Niagara made her hundredth round trip between Australia, New Zealand and Canada. In 1931