sinking of in Wellington Harbour on 10 April 1968 highlighted the lack (and necessity) of a video link. Footage shot in Wellington could not be broadcast in other centres around the country in real-time, and the extra-tropical cyclone which contributed to the disaster grounded air traffic, preventing the film being flown to other centres. Footage was screened in Christchurch and Dunedin via a recording made from the Wellington signal received in Kaikoura, which was then driven to Christchurch to be aired immediately. By the time of the Apollo 11 mission in July 1969, the two islands were each network-capable via microwave link, but the link over Cook Strait had not been completed, and there was no link between New Zealand and the outside world. Footage of the moon landing was recorded on video tape at the Australian Broadcasting Commission's ABN-2 in Sydney, then rushed by an RNZAF English Electric Canberra to Wellington and WNTV1. To forward this to the South Island, the NZBC positioned one of its first outside broadcasting vans to beam the footage to a receiving dish across Cook Strait, from which it was forwarded through the recently commissioned South Island network. The link was completed later that year, the first NZBC Network News transmitted on 3 November, read by newsreader Dougal Stevenson. With the establishment of the Warkworth satellite station in 1971, New Zealand could finally communicate with the rest of the world. The first live broadcast received by satellite was the 1971 Melbourne Cup on 2 November. For the first 13 years, NZBC TV broadcast solely in black and white. Colour television, using the Phase alternating line (PAL) system, was introduced on 31 October 1973, in preparation for the 1974 British Commonwealth Games, held in Christchurch the following February. Due to the lack of colour facilities, only four of the ten sports (swimming, diving, athletics and boxing) could be broadcast in colour. 1975–1980: Television One On 1 April 1975, the NZBC was split into 3 separate state owned corporations: Television One, TV2 and Radio New Zealand. The existing NZBC television service became Television One, and was based in Avalon Television Centre in Lower Hutt which opened that day. Television One used the WNTV1 and DNTV2 studios and the existing channel frequencies, while AKTV2's Shortland Street studios and CHTV3 studios and new channel frequencies were used for the new TV2, which commenced later that year. Television One