The factors are
1. Indios were highly skilled shipbuilders.
2. Indios were an abundant source of cheap and exploitable labor.
3. the location of the Philippines in relation to transpacific trade routes
4. abundant supply of quality lumber.
Shipbuilding is the construction of ships and other floating vessels. It normally takes an area in a specialized facility known as a shipyard. Shipbuilders also called shipwrights, observe a specialized profession that lines its roots to before recorded records.
Shipbuilding and delivering repairs, each commercial and navy, are known as "naval engineering". The development of boats is a similar interest known as boat construction.
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