Final answer:
The captain and the cook create a makeshift sail using the captain's overcoat and an oar to allow the oiler and the correspondent to take a break from rowing.
Step-by-step explanation:
To give the oiler and the correspondent a break from rowing, the captain comes up with the idea of using his overcoat as a sail. The captain remarked, “I wish we had a sail,” and proposed to “try my overcoat on the end of an oar and give you two boys a chance to rest.” Consequently, the cook and the correspondent hoisted the overcoat on an oar to create a makeshift sail. This allowed both the oiler and the correspondent to rest simultaneously, as the sail helped move the dinghy without the need for rowing.