"Point of Embarkation" refers to the airport or location where a passenger begins their journey or flight. In the context of transiting through the Hong Kong International Airport (HKIA), the point of embarkation would be the airport where the passenger boarded their flight to HKIA.
For example, if a passenger is flying from New York to Bangkok with a layover in Hong Kong, the point of embarkation would be New York. In this case, the passenger would be transiting through HKIA to continue their journey to Bangkok, and the point of embarkation information would be collected for record-keeping or tracking purposes.
It's worth noting that the exact definition and use of "Point of Embarkation" may vary depending on the context, regulations, or industry in which it is used.