MARINE Department radar did not pick up the fast-moving jetfoil yesterday, indicating the hijacking took place outside Hong Kong waters.
The department's Vessel Traffic Centre records the movements of all vessels inside Hong Kong waters, and has been focusing on high-speed craft which are known to break speed limits.
But the department said yesterday the Guia did not show up on its radar screens.
'We have checked and we have no record of it entering Hong Kong waters,' a spokesman said.
Yesterday's events will again throw the spotlight on to the 130 high-speed craft which operate in and out of Hong Kong. They made headlines this year when two collided.
The Marine Department has issued special speed limit exemption certificates for the 130 craft to allow jetfoils and catamarans to offer fast services between Hong Kong and Macau, and Hong Kong and China.
The Lloyd's List says the Guia, made from aluminium alloy, was built in 1964 in Japan. It is owned by the Chinese Government, registered through the Panyu County Branch.
The List says it is registered under the Chinese flag, and a source claimed it was managed, not owned, by Far East Jetfoils and believed it had been bought second-hand.