Final answer:
In 1775, the Second Continental Congress approved the purchase of vessels as part of their preparations for war, although the exact number of vessels is not detailed in the materials provided.
Step-by-step explanation:
In 1775, the Second Continental Congress approved the purchase of a total number of vessels to prepare for escalating hostilities with Britain. While the exact discussions concerning the number of ships are not detailed in the provided materials, the Congress was focused on mobilizing for war, as tensions had reached a breaking point after the conflicts at Lexington and Concord. Delegates of the Continental Congress recognized that the war with Britain had begun and were preparing accordingly. Congress was not only focused on creating a Continental Army but also on establishing a naval force to contend with the British Royal Navy, which had been threatening American vessels.