Two new $47m boats launched in Sai Kung Two new police boats went into service in Sai Kung yesterday, bringing to six the number of Keka-class vessels in the force's fleet. Police Commissioner Dick Lee Ming-kwai launched the vessels at Joss House Bay in a commissioning ceremony during which he paid homage to the sea goddess, Tin Hau. Bowing towards the temple on the shore, Mr Lee prayed for blessings to safeguard crew members on board so they could conduct their work safely. The boats, which each carry a crew of up to 13, will be based at Ma Liu Shui and Aberdeen. Keka-class ships cost $47 million each and have a top speed of 27 knots - the fastest in the marine police fleet. The 30-metre launches are lighter than older boats in the fleet, as they are made of aluminium alloy instead of iron. They are equipped with the latest Orca Master radar-linked electronic navigation system. 'It allows us to work out a route before sailing so that our journeys will be safer, as we are more prepared,' said Marine North senior inspector Yuen Ching-fong. 'It also helps us find out our own location more accurately.' A wind-speed log is also installed to inform the crew about the direction and speed of the winds. 'The more data we have, the more efficient we can be,' Mr Yuen said. Keka-class vessels were introduced in 2002. The two ships launched yesterday will replace boats that entered service in 1980.