There are several records of white-rumped storm petrels thought to be Wilson's in the Hong Kong area.
19.3.1989 2 at mouth of Tolo Channel (Avifauna page 485)
27.4.1992 2 330 miles SE of Hong Kong seen from a yacht (1993 HK Bird Report)
28.4.1992 5 270 miles SE of Hong Kong ditto (1993 HK Bird Report)
14.6.1972 1 at mouth of Pearl River (records of Royal Naval Bird Watching Society)
Wilson's Storm-petrels have been recorded off Singapore, Malaysia and Japan, mostly in summer.
It seems likely that birds from the southern hemisphere move into the South China Sea in their winter (our summer) and could be seen in the Hong Kong area in the summer period. Mike Chalmers certainly thinks so.
What ferry was he/she on?
