What is Ralph's plan to be rescued in The Lord of the flies?

The boys accidentally let the signal fire burn out. The rescue plan fails as a direct consequence of the fire going out. The fire went out, despite Jack offering that his hunters would take over fire duties, because Jack thought that hunting and killing was more important that keeping the fire going on the slim off chance that they might be rescued. He 'needed' the boys on fire duty to take part in his hunt.